Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ebddc7ae3358e9…

MALICIOUS

PDF

88.9 KB Created: 2021-06-26 02:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d03c4b02cda7d909bf21ee7eaa3ebefb SHA-1: 81b1a1ec01d929179baca6dfcf08f502fbc2e331 SHA-256: 21ebddc7ae3358e9731611ddb3eb05827124e2531aaadd1db892687d63b15a21
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document's structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://wastran.ru/uplcv?utm_term=how+to+write+text+in+a+circle+photoshop
    • http://aptatravel.com/clients/4/48/489dad2d2d8436d4c085fc0ccdc2d1b3/File/95816678357.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12bce69942---28279105040.pdf
    • http://vandientuchinhhang.com/upload/files/68460881630.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b609ca95b---89057043366.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ko5g1ojgv1qfpfu951365eiq9/sopawevukon.pdf
    • http://geredekombiservisi.com/userfiles/file/xerewetuk.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/21802654647.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e87afedc---baxitupux.pdf
    • http://idealhca.com/admin/images/file/vafanijoxuzagore.pdf
    • http://alumcity.ru/userfiles/file/16035471108.pdf
    • https://cortopolis.ar/userfiles/file/tegiparusomabunufabifuj.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ffmhp73vqc9vgtdscbqc2a7e84/13668144682.pdf
    • https://aedwea.com/upload/foto/40642612011.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab209cd532f---refemizanetuv.pdf
    • https://bititechnika.com/uploads/file/43519184609.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a18eaf81ea8---84803904502.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd74f152bf3bf920ebafeb9128eaafb1/10278045351.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b453258e---61345112106.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e6f7df5c---lowuserax.pdf
    • https://aucordechasse.fr/vosImages/12407625051.pdf
    • https://sayurhijau.com/contents//files/13198657227.pdf
    • http://aggengr.com/uploads/CMS/file/85965443178.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/46128236088.pdf
    • https://a2designbg.com/userfiles/file/gowowuvikotuv.pdf
    • https://detmers-kontejner.hr/files/13188447372.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75c.bin
026d282f68d66e3defb9e5d99dc0c13a14ebb292dd7fbc2f6631b84c357c1efb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 17748 bytes
font_01_sfnt_off0001258a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1258A 16792 bytes
font_02_sfnt_off00013da1.bin
1a0fac62eb220a1a69487c3a3f2e1df69c2e81a6eb39d456a27fd4e55e2c7316
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA1 10648 bytes