Malicious PDF — malware analysis report

Static analysis result for SHA-256 602af0492d772c26…

MALICIOUS

PDF

83.3 KB Created: 2021-09-04 01:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eca9c0107e99a0f9ad9563c25acd23a1 SHA-1: 88427ebb206344c1bb877e1a063df0dd38ce7ba2 SHA-256: 602af0492d772c26f4d755fc0cc85cfaa181495e64d59b066242174a4d8586a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=kontrasepsi+darurat+pdf PDF link annotation
    • http://thewellmanteam.com/userfiles/files/suxexizezozomotil.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/45412165620.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/52680747761.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/fuzazibogotisoxupuruf.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/32051165245.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/9919633975.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2c58f767d4a7afb1c83dbee242c59665/55614152998.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/u47o313uftnh0pdcj1kc9oo273/57925434780.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/sitixiponoguvefejudevas.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/66061060023.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/hid7coatoj7td8nt3me4i2ijso/13247212846.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1ulhl4nlbk0nek5p33csbie9bp/65340660547.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/23387035124.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc5b101619---naxalu.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/39iciajqaj5f5ven2uat3fqptf/62585665131.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607be06880e7a---24727354296.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/56810207058.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/86712749696.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/30564924766.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/56003755287.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/97504542488.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/kt23t79rpkn2h1q8nne2fvs2dt/rikegadatani.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d32787ddf---67595946598.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160723f963446c---33062333366.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 10536 bytes
SHA-256: 7bf4cc453ab2b0f907b7b93ea9b1a40676719d089de6c06ef00007527950f805
font_02_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 17564 bytes
SHA-256: aa9e99c78b59df2c779e725d51ef50395660561eada7a5a284f54b04f312c80c

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