Malicious PDF — malware analysis report

Static analysis result for SHA-256 916f2072dfdc801d…

MALICIOUS

PDF

116.8 KB Created: 2021-07-08 04:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 91336417b319ddfb0e81792a01f96fcc SHA-1: 0ce69c77f27fe8b6030e52bb584dc3df29e9580e SHA-256: 916f2072dfdc801d949d877d3fc25c88e8195ba265067eec4610a6ab217011ea
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs the user to copy and paste content into a command-line interface, likely to execute a malicious payload. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=java+minecraft+ps4+controller PDF link annotation
    • http://yangpupark.com/uploadfile/files/pizevigezugakokeboja.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/0119fa8d86bee8b2c4ae1860dd5e1903/14451380457.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/4174854261.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64025878e6---38764346886.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/51709249134.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/e62rc40k1u69oj085clgrhajp2/13387457133.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092e9bb68874---2364982937.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/aca6e6113eb376ab846fbc3553038fd5/tedovesurapufuj.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/41424193329.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/5ol6ug3c0js38m55uii2irnknl/91556112643.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/7925540601.pdfIn PDF document text
    • http://k1a.ru/images/files/file/lojute.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc27b77a3fb---83273965069.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d67de3582a---65415463141.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c477bcd5507---lagodikixigakutame.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a884572e970---84028942902.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608210444ec24---74777775648.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2b7dba670---75827934165.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dce8f4cc4cc---korum.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/sidodetabi.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b2fa82d7---getugidevenibaz.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/ed585671adddbed7ae12d45d4e2f31d8/fugamor.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/tarezugitimenapalo.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d555c8235f1737255165a7bf1440d669/59469596908.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/lefixipikogi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9B 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
font_01_sfnt_off000160af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000178c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C1 18828 bytes
SHA-256: 6e8bb88ca3c5de55770a928318e7154208e7c47cbc4879942bb53365d203c5fd
font_03_sfnt_off0001aad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAD9 10776 bytes
SHA-256: 97c0ccf8b7fef34f035ceedd9e3bf22211a745b9ed359f86046bc7e889d0acfe

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