Malicious PDF — malware analysis report

Static analysis result for SHA-256 6007e279d643ffe4…

MALICIOUS

PDF

104.2 KB Created: 2021-05-21 06:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5776f97e20a4a578137b0a5be3c95857 SHA-1: 007252ed4dcfa0ba80aa48647839c77d576c3492 SHA-256: 6007e279d643ffe4703caa3de3fe12a5855422cc263290bb7004b20b84e7583f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://laborke.ru/uplcv?utm_term=cuento+completo+un+viaje+de+vacaciones+escrito+por+roger+pare PDF link annotation
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160873cf148eb4---vafivopazexaz.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/55ebc99b602c26af79810892a5f8d882/kezisutopiwux.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609191c2d9fd4---36956484852.pdfIn PDF document text
    • http://amandamaitland.com/images/file/12819124051.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2ab4e3b595216c517e1bcc990f322c9a/97454967958.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/posenimolutobatafemoja.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/guzixevoseji.pdfIn PDF document text
    • http://strandedtattoo.net/file/55058445213.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ebe95201c---taxikokemikosug.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/k6cg54jb0ds25v9g20d3dajbri/zexuxerovopixanupe.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/8llb3dg65a104gv828o5skms9o/43466996774.pdfIn PDF document text
    • https://invest.pl/userfiles/file/94415313795.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aaf9e1de0---vajosuri.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0fe6e885---dawuzimanoxofel.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44a8d95bd---danuganafofogosetobitu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/pav6lrsgvf0pl6glbnkeul7jac/18047076689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAD 5436 bytes
SHA-256: 9b14314b4496433fcc536333e88199d2a81cda799e5ae4f643469ab23d507976
font_01_sfnt_off0001621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1621A 12716 bytes
SHA-256: 4104b81ef984acec678d3ca5dd7f99e5914dad27772269f804c05872c7109d2e
font_02_sfnt_off00018aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AEE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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