Malicious PDF — malware analysis report

Static analysis result for SHA-256 c817109980d22873…

MALICIOUS

PDF

99.4 KB Created: 2021-06-27 04:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2cf1107e7764c55c55ed552176a68387 SHA-1: 1927fb13e3e176b4195fcd252b623a3c27a7ee67 SHA-256: c817109980d228733f597ee3a135d87969ec1563dd5176714f6688f14237459b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the overall structure and URL patterns point to a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=html+css+javascript+interview+questions+and+answers+pdf+free+download PDF link annotation
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f8848c42cbfbd6d10c0963cdc86040e0/sudufuv.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/68768102407.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/ecc61e8584c28adbee3268c813221a47/lelimudotinevidipifowudur.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c6d596f3---bujagobidig.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/94811036026.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074fbee7edf0---93951352901.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/67jhi40q75l89unu4t073aetje/konimituxenosogoxebe.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/rojewuxavo.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/j5ial7l5s6c177u365ke2o1l05/19487329011.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gemejoriz.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/87003035977.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/fd5b5ee3a0a1a937bbf8c4d83bfd5955/84075545549.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160746553a0d97---zoxejurifevijax.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/g9mjagn6kbj7evv7pfigijp106/boboju.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/xalefetetezevanewod.pdfIn PDF document text
    • https://faceless.me/userfiles/files/35102721533.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/im6iftks453i0el2f860bf48sk/bosazizoxemezaxudom.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/xeraduxilemixinefelexeles.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/fukasupefijav.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/mebigozavavalalotubibiweg.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fa851dd6593434a18c9bf3dcd635d69e/36358777565.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b21918d0797e970e9e5ec0af1760c580/17392707888.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/dbdf77d9027099951c50d05e701bb8fb/44012331072.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609115a152eb7---resavutolozevolalizobevut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000135cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CF 11300 bytes
SHA-256: 6d4575034b8e72bf03aff7007c110c2a59987d4b37fd5eecf6a6b022967ad627
font_02_sfnt_off00015024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15024 18204 bytes
SHA-256: 9b0aaa8dbf9ea6d5165d2d62abeafbfaaf9376c5db26dadbe3851f082f3de639

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