Malicious PDF — malware analysis report

Static analysis result for SHA-256 95226f09a6bf4f9e…

MALICIOUS

PDF

86.6 KB Created: 2021-06-17 08:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7c6d5f9f62e1ab65b8f431bc5644c9f5 SHA-1: 6680c91c78eeb4b6e1a7902109744a0cf6647f1e SHA-256: 95226f09a6bf4f9e3df4eeef7b8d1bd2b6daccd11530e13882af4ae7636e038f
196 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, strongly suggesting it is a phishing or trojan delivery mechanism. The document's content and embedded URLs indicate it is part of a link farm designed to redirect users to compromised websites, likely to download a password-protected archive. This tactic is commonly used to bypass security gateways by encrypting the actual malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=autocad+block+visibility+states PDF link annotation
    • http://aimic.com/userfiles/file/54326558661.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gi0nieahltoqrcu3gsusb405df/dupunuwarimoparil.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4111bcc3bd751d7a3f487abeaca8668f/28960661275.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/70fc37a4f0c3c9ee72cf701d35b057e1/70428305289.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/d0069d41ee4aed0c22e7f67ec781145b/81451591278.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/fasewapudinu.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/17321225992.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b058c0a130e1df870d5fec207d1696bb/87474584417.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/1rg85jaedq2jnrf77ifkm93eln/74074395942.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acb4f5ca399---gekepivibo.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/vusowujol.pdfIn PDF document text
    • https://bursac.net/userfiles/file/pebubozasimelikixeparutis.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021060414513473499.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tuvizuv.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/sisonevesubamazubagabeda.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://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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 4968 bytes
SHA-256: abcb142196b04bbf650bc692dba83c556dd5778095d5aa2528f4b576ff98ff5d
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 20456 bytes
SHA-256: 5cd32db06c6c1b7b08c4ccb41310597fc464804bbb60ead0b4e872280601eb06
font_02_sfnt_off00013f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378