Malicious PDF — malware analysis report

Static analysis result for SHA-256 4468271681c63340…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 13:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a77396b2366bbe57a18a3fd6f77416a1 SHA-1: b3ed75f9172e3a703836cf86f3fdf0edbc086436 SHA-256: 4468271681c633408c023fbab5a3d04f32a842dd9de8807609e5e915a23dab34
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 a phishing or redirection lure. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or redirect users to fraudulent sites. The document body is heavily obfuscated, preventing a clear understanding of its specific pretext, but the presence of numerous external links and the 'Payment redirection / bank-detail change lure' heuristic strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/kupukinufupezagupudux.pdf In PDF document text
    • http://soft-pro.hr/upload/datoteke/10857722491.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/57866496703.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/67v066o9fp921ob1hs3r43mdgh/37347916924.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210614122125.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/cd9abd61c22beb03ff2730910f840cff/47478507381.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/weloxororobixag.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6069cb042---kojakafujipefuwo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac1da03cb99---66975185298.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a83bcab912eda3f515da36fb2b734f45/rugovif.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/57a7896bd6f2b9bb334e49a4d38eb6b1/zivazavidovosesipudov.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/58718761260.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0540a920ac---zedixuvozovevev.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cd08a4d0d56---dulokewojab.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/20725019490.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/32b2dc02de6752fefa06ad8c52c712a0/fimomizoluluninav.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ds2su1m5e01hl08p0erce8du5n/loxufugawib.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6a5ed7fc---14345355874.pdfIn PDF document text
    • http://vce34.ru/attachments/file/supujakozor.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/6805b931923d6876364ebf25ea6de267/50207420865.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/79a366136b8ab6b18abe7672e35da4a2/ruzominumimanaramugofesef.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/42068185506.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/83389676276.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/fufoxodanopefivaf.pdfIn PDF document text
    • https://ksuskalology.com/images/file/wowejasonogup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=second+hand+tack+shops+near+mePDF 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_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 10808 bytes
SHA-256: 32d7f6ec57f6628e567c2f3f24689c433eb5fff4dc0abcb3dd9ffc8572f98c22
font_02_sfnt_off00012eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB9 17364 bytes
SHA-256: f025c74a3b7cae2d44a2a98a593c67a2a0a42ca070e60dbaf07e27405be2c150