Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a2982c2b4f18b4…

MALICIOUS

PDF

99.5 KB Created: 2021-09-23 00:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 60295975cee56580541fade3019a7781 SHA-1: be088a51eff1abb9ab451af826e996d45aaf96c8 SHA-256: a7a2982c2b4f18b439ca7f53fc50a3c3e63177509d71a8b1ca3769970c876908
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://ketchas.ru/uplcv?utm_term=chal+mera+putt+2+full+movie+download+filmywap+480p PDF link annotation
    • http://hotelrealerimini.it/userfiles/files/sakalimetal.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/naregilumulivuriruj.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/53394181392.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/zukovabumuwivakavulomevug.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/83068730219.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/47543843128.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/tojunuviw.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/45296788329.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/r2u2rm5jhcv0fc2uq1nhoe75c0/39561819771.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/3402901162.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/40015348840.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/23831690676.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/didixitiwuvufumerejamut.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/ac1b11690b85d680e20b0586df54a64b/mokitugojugulutunolotixu.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/xukupe.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/jegatewedarusugi.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/bororemonama.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/98340806374.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/lefivejefirokaxobi.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/xemekixiboxabosut.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/631d3cbfee4b25c62bbaaa26f2fe789d/retafakavudaxakudatafar.pdfIn PDF document text
    • http://linza-market.ru/upload/files/jejoketoxutejop.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/gebofimakarimof.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109A 11520 bytes
SHA-256: 55af68dd395f88716c93dc225d0ceb51399ac366a40cb32c9b26321aba5ec78e
font_01_sfnt_off00012bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD2 19460 bytes
SHA-256: dc700385cb6ebb2ac41d8528b0ccfa739e5a122bcb7740f69dec7bd194f5a2c1
font_02_sfnt_off00015e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001766d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766D 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105

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