Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb179c6ee96b89a1…

MALICIOUS

PDF

84.7 KB Created: 2021-04-06 06:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c66c28a07123823c679db4895dd0d890 SHA-1: 5cd1990f6e95bf51026e949b7e103c83f395cdc8 SHA-256: bb179c6ee96b89a140a6b9f06bbeab771332e0e948995fd87c4209aca00171e8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical 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: action link to abused redirector https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/807311.pdf.
  • 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://fokemale.ru/strik?utm_term=which+banks+support+zelle PDF link annotation
    • https://cdn.sqhk.co/vipujitebiki/f8OFhdO/givovofisowodexekujebon.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/yaesu_ft-450d_qst_review.pdfIn PDF document text
    • https://cdn.sqhk.co/tuparesoxaj/jcghjaE/latest_android_version_for_samsung_galaxy_s3.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/807311.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/ranusebujewovub.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/xGzyicL/instagram_fonts_generator_symbols.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/edjisjb/jegejoxuvakekidu.pdfIn PDF document text
    • https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/zoliduzeve.pdfIn PDF document text
    • http://frontglass.xyz/nogidexovijeldnv9.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/nvsp._in_form_8.pdfIn PDF document text
    • http://teksalle.xyz/744653106031nm6e.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/jizalojelebubufelusa.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/GibBewZ/pitipoz.pdfIn PDF document text
    • http://arenaprobet.com/42362917477owwm8.pdfIn PDF document text
    • http://evakuator-uga.ru/so_sad_today_viceo7944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_3a037285e32c4a75b78be0991fa8c5e1.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_1caa865edc6f4ddfad70f441fb125917.pdf?index=trueIn PDF document text
    • http://ximumipos.rf.gd/bojolanut.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/efecto_paradojal_de_las_benzodiazepinas.pdfIn PDF document text
    • http://fosisoxefet.epizy.com/dstv_super_sports_guide.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_60d5995a85e044e4902ae261aedeb1e1.pdf?index=trueIn PDF document text
    • http://juxirijedatez.rf.gd/tafeloreguxako.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/asociacion_civil.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_3fc74f48b0e54303a1de490788ad7153.pdf?index=trueIn PDF document text
    • http://lavavoju.rf.gd/authorization_letter_sample_word_format.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 5288 bytes
SHA-256: f704dc2544a7d9f10445cdbefd2696249e2f8ab781bbaa0c5f3c3cd0b7395e17
font_01_sfnt_off00011d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 11628 bytes
SHA-256: a6c63765e0a1f588e9e033b2e5b0724adf5d4bb348025954eeefa7bd5eacad6d

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