Malicious PDF — malware analysis report

Static analysis result for SHA-256 d214f8a2eb4252c8…

MALICIOUS

PDF

78.8 KB Created: 2021-09-18 06:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7cff13c6c31889254d02c0dc7fbe5ba8 SHA-1: 6b496093deccdb3f0c4627cba1ee3715e953ca0b SHA-256: d214f8a2eb4252c84efd801450be11cc29cdab90025909915dbce040101cd06c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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 http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dk96vuh60j8dpqdchq5nh2msm1/pobotevena.pdf In PDF document text
    • http://kartinatv.org/uploads/files/melulemepoji.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/82034636200.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/62675726343.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/81998774450.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/bigozowokufodejomo.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/36052717637.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/tutajasavilofab.pdfIn PDF document text
    • https://gilbertems.com/videos/file/622894745.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/389q1eqnbku128aou9g8hc9r52/roviputivejanewivozufitub.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdefb86dba---44208516724.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405c72e9c7d---8683447690.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/68861983192.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/zipibidiwubujuv.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/tuzedural.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/70595275209.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/pitavepelup.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/pulaworarurowulosagorofep.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/datujosutelexuzodefufewo.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/632111309.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/talijujesapobawib.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf17dc5a60---70802458030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=installer+app+androidPDF 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_off0000d2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E1 16976 bytes
SHA-256: 38bb10e9462c40231f79b2398b27f09f74171fafb951329ad982815d6315576e
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 10336 bytes
SHA-256: 427cd0e18f2cfcfc9e3bd9581c02021b29f6c75065483519336f5fcee0e263ad
font_02_sfnt_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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