Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2da7b62c012367c…

MALICIOUS

PDF

81.5 KB Created: 2021-08-30 02:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b04852872786f05fabedeed1bb9b78d0 SHA-1: 6313b1ee4ba84a5ae6b4a540dbf19f737cd7988d SHA-256: b2da7b62c012367cc8a4c8246109a2ab2ae7462feed6f7cd7226bab31804e510
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF document was flagged by multiple heuristics, including ML classification and ClamAV, for being malicious and a credential phishing lure impersonating Facebook. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the phishing lure strongly indicate an intent to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Brand-impersonation credential phishing lure high 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: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=everwing+mod+apk+download.
  • 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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a47c4c7209---posesotanokafatuzuv.pdf In PDF document text
    • http://bestbelly.org/content/files/files/zowuso.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/zizifig.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/54147541353.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/30490864519.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/litineke.pdfIn PDF document text
    • https://ikima.fr/uploads/file/18105840765.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/36a6d8d83b0648d7368958103dbd8485/kinarowipoxaza.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd761f0b66---71012100522.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4b03gfc7hnvh887k2titdfqobm/81181791299.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609477f09cad0---rurudolazevowisawexivi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0cd124c8f---foxavekurowowa.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6d2fd7b28---11647231507.pdfIn PDF document text
    • http://getem.eu/files/file/fexir.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/8466933495.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/67101401879.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/xowoxugasazojubuvip.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/30003060043.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/79931629298.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ddipbvqj1nktqd1tob9r561jl7/62859725161.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/40473830721.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608462a95fd58---95661494041.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/2216527389.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/23388931947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=everwing+mod+apk+downloadPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 10696 bytes
SHA-256: 4e0b160270db896e6dc2369105a308f7f03a5e2c8c3fee734a73541d938edd04
font_01_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3F 17872 bytes
SHA-256: 39a62919e09af5a621a24bc8ed6d40b480a4eaff3dda5b2243d8aee04648eb2a

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