Malicious PDF — malware analysis report

Static analysis result for SHA-256 1675d45c4fab5a2b…

MALICIOUS

PDF

76.3 KB Created: 2021-06-12 23:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eec6c705452110e12f475e0ac8215c53 SHA-1: 5ec6f33bd8a70c895448c9cfcf4cc9ee2a8e7769 SHA-256: 1675d45c4fab5a2b8f5857ec44bc9dd043e3d62f594f9610668de0e2981bc16e
164 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many hosted on compromised WordPress instances, suggesting it is part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a site that exploits vulnerabilities or serves further malware. The document body's mention of 'gold live chart world market' serves as a lure to encourage clicks on these malicious links.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=gold+live+chart+world+market PDF link annotation
    • http://ahchala.com/img/file/pinaki.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/208e53eaa0f0e817f90de0cb45f6a0c5/31172513152.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/r9m8g8rhpouo98o11rf8r9grd8/16727516982.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/8a5a6ad437b27dadcf957dae0e762027/xolikukukajasilo.pdfIn PDF document text
    • https://led7.ru/file/51701790132.pdfIn PDF document text
    • https://abeess.com/userfiles/file/81810579081.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/212314147684.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf801374de---85085657086.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a7f3a8e1c---96630540071.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/i24if92rg870tgpkj01pc2p42t/xopivosofuju.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/favekeditilizijowevepo.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aba9b41c200---fevadugefamowovawuxokij.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/xajafajibijowosepofu.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_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 4928 bytes
SHA-256: a8bfd0882b676feb11b85d0a5924a4af97b0633b4617d217abe223f73d8b42fc
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 10532 bytes
SHA-256: 23ff8c39d965b967a8329365d286604caf93362756cf218af9e4711f00d309db
font_02_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71