Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a023e68acb198ad…

MALICIOUS

PDF

92.3 KB Created: 2021-08-01 05:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 81e489d22f9460f4b06c32818195bc3c SHA-1: 154faa6e0b0d4851998e6e5900098ce0ba6a9ecb SHA-256: 3a023e68acb198addda4c92e48599caaed5e3231b9e5a8cbadd65739e8de9005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, suggesting a role in distributing malicious content or phishing pages. No scripts were extracted, but the presence of external URIs and the link farm structure strongly indicate a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=tomb+raider+shadow+soluce+cite+perdue PDF link annotation
    • https://soft-print.pl/app/webroot/media/files/88102466983.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086a603df014---tisivabe.pdfIn PDF document text
    • https://cooperspick.com/files/toworogategipovinezege.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/gafepidek.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b297775c60b---38416605164.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fe1472279---26034610934.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/o105j66p5ts3vs135nqu1pqb9e/kujewumokid.pdfIn PDF document text
    • https://priscar.com/documents/files/61933869747.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/donabi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/k8699m90g3v4b6glips7p1dqr6/82524576022.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/manefasilepatadol.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3aaf282db---rebopumaruwiboragobuser.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/xafikenaxadekuxafinanub.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/08834b0cb2f0ec64d1af2a64614a2c9d/13841821130.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ce79ba8f---37532914144.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/nijixiruruzekifonagix.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cc9de83b7---27962371300.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5930751a1---vetit.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0sb9ka55ui14c19bd4i3fq1e24/4013366332.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/69564019926.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160862617cd617---58120046120.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/d4537d06847a6e7e818969c752c3564a/35177825778.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/8v0k2sg73ucnppeujrpnumgfpd/kemajixenizaranirebi.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/giwalafoburovire.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/90305270779.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 10964 bytes
SHA-256: 5a60a72f8d92d59de0273b91e93100433698e3a39131f4012c572295f0b367d9
font_01_sfnt_off00011d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D35 18088 bytes
SHA-256: d5a8f7572e431cb197ca51014b40ff20903237443b25e8235f2198ef242c97d8
font_02_sfnt_off00014a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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