Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d87c0cb53af8583…

MALICIOUS

PDF

127.6 KB Created: 2021-03-11 05:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 97c76664f06fe9a38672d987232a54e8 SHA-1: b6c7970587a8788ebd44dec9203854cf0dbdb2e4 SHA-256: 6d87c0cb53af8583531d46bf3eb44ed62c73ac3a582bf8f3883f265cf1ddc340
286 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure and a link farm. It directs users to multiple external URLs, with at least one identified as a credential phishing attempt impersonating Microsoft. The document's structure suggests it's designed to distribute links to potentially harmful content, possibly including further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/5539660.pdf.
  • 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
  • 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://jottigo.ru/123?utm_term=forgerock+openidm+installation+guide PDF link annotation
    • http://good-production9.site/56173829189wfz5e.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/hegd6gi/13574093564.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/whcgchi/spider_solitaire_card_game_free_online_aarp.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/injiibh/picsart_photo_studio_photo_editor_for_pc.pdfIn PDF document text
    • http://ogranicbio.space/download_sanam_band_all_mp3_songs9of48.pdfIn PDF document text
    • https://cdn.sqhk.co/kajojetugap/mhcWoij/sepivimorigudodufonuz.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/5539660.pdfIn PDF document text
    • http://copyright-supporthelp.com/poxepunerafawoxopulebao4h.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/h7Qgeif/houseparty_chrome_extension_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jhmBrBx/tixileladefavumaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/TVchbt7/36173602554.pdfIn PDF document text
    • http://fortuneo-enligne.com/brown_bear_brown_bear_color_sheetshz21c.pdfIn PDF document text
    • https://xumefuzodagugud.weebly.com/uploads/1/3/1/3/131384373/369e81.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/uhebCjg/xatezitowunex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womawujun.atwebpages.com/wibibeg.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/el_arte_moderno_giulio_carlo_argan.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B482 5412 bytes
SHA-256: 738e987c6f7833e8b3817f4f0d124ccbe6849af255b9eed8ffe61216c47d95d4
font_01_sfnt_off0001c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6E1 12768 bytes
SHA-256: 2fdb16f8772f9ca69583918b0f61ad0216c7c4ce2919d49132d50f94df050903

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