Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f694fd359827f8…

MALICIOUS

PDF

76.9 KB Created: 2021-06-07 21:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4accf09ca1e5776aa44162789179492d SHA-1: e844a95e0d4027358b732906511dc970e608fee2 SHA-256: 06f694fd359827f83735d868ae483ca7dbecdd124aebb808c583901ace04fb78
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains, likely to download further malicious content. The presence of a 'Password-protected archive handoff' heuristic suggests the document's primary purpose is to trick the user into obtaining a password to decrypt a subsequent payload, often used to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://allytemp.ru/uplcv?utm_term=jlab+jbuds+air+executive+manual+espa%25C3%25B1ol PDF link annotation
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/57bae31967dace7b5983686562890a37/vofinazaxixivigakiwu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fe40eadf49df48e081635325ad885e1a/60237117736.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e078446ff9---98858021616.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/joxaxozawurarapunuba.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d45a6c761214f94e9901e8b76f61841/82621274753.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160832007807bf---57889197106.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b05ef454e5---kuzogojezubodemelafavuzel.pdfIn PDF document text
    • http://evola.it/userfiles/files/57081256735.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/05e7c9087d9dd7a18550a342cd5e38a9/fenufonedajijixipi.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/lotibetixagaboreku.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072af0e677f2---51342704802.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/70416659037.pdfIn PDF document text
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/70b564dc4d5d49f5b5a49d100103e77e/45216563384.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/robusosodipawapurabivev.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd95750d31---laxenuxedokiludef.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/matajupixutufit.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/291804090.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b41c1f81---15994620679.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abe41a1186f---xanutataxavabojapovetaxog.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210601050330734706.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fccid.io/2AHYV-JAIREXECP/User-Manual/User-Manual-4811163.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 5764 bytes
SHA-256: 1b1e58a886527663251943ce9e0e92113bd5e24f52ce205e425c2ef27e647854
font_01_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 12940 bytes
SHA-256: ba6c61159b387b9a30f57bb1969cc0d40a1d2e07f1e2e3238472f47f128c6d47

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