Malicious PDF — malware analysis report

Static analysis result for SHA-256 6660c9f7cfb98752…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 07:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 79d0f0659d79846b07e0e018d240059b SHA-1: 3016a5adca57d7b7b0ff697ca12a61d5d0cde52b SHA-256: 6660c9f7cfb987520d22a73fd7d118b33ff67abeb516d5dc583e245bb23c69e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=electric+man+game+hacked PDF link annotation
    • https://cdn.sqhk.co/tokarikadez/pAFicha/zello_ptt_walkie_talkie_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/fX613hg/heart_pronunciation_ipa.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/Ojhieib/fit_the_fat_2_new_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379848/normal_5fe5a76da8913.pdfIn PDF document text
    • http://upgrade4me.com/kufexololimixudatuxemexg7p9g.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/VgdgidK/money_hack_story_mode_gta_5.pdfIn PDF document text
    • http://gratoram.site/463092234142etnz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5feb169fdc319.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisaxozof/4jivjat/star_trek_timelines_crew_max_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/b0jigfr/amazon_seller_central_customer_service_number_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5ff58534ebcb1.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/ifZW3jh/zexarulalalulur.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/gxid5gg/bulop.pdfIn PDF document text
    • http://lestyprin.online/30319893174lrz7r.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/ajgLbzy/46661192317.pdfIn PDF document text
    • http://vekifurusib.22web.org/6th_grade_math_vocabulary_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/colchester_sixth_form_staff.pdfIn PDF document text
    • http://gadivedu.rf.gd/consumer_reports_mattresses_casper.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/august_alsina_testimony_album_sharebeast.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/extrusion_plastic_sheet.pdfIn PDF document text
    • http://vamudijikepefos.rf.gd/caution_money_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/parasitic_architecture.pdfIn PDF document text
    • http://diwuvugu.epizy.com/dpph_assay_for_antioxidant_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/bg_phonetic_traditional_free.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_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 5196 bytes
SHA-256: c12ddbd368cc5313cc5868c8e3e3c86b1296eefefca89c54ea6b770afc72d34a
font_01_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 10344 bytes
SHA-256: 9ca65e8b1c610ca0233d83af3ed0ef71a8b35e721b88c9970ff94d53d0ac61e5

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