Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b45e10b7e6f1307…

MALICIOUS

PDF

80.7 KB Created: 2021-03-16 20:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 46f28c90974234ea0f7bc0dd82bae233 SHA-1: 1dabe767e6d9ce13fd3a21e0c1e1e3871c647dd8 SHA-256: 7b45e10b7e6f13071d11fbce15b260bfb619e207e3fb49a33dfab10b7571843a
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. 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=incomplete+and+codominant+traits+answer+key PDF link annotation
    • http://goproits.com/nfl_2015_schedule_week_2_foxenzia.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/ciclo_de_krebs_rap_mp3.pdfIn PDF document text
    • https://tijukubi.weebly.com/uploads/1/3/4/4/134458902/a8d761acc1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_60007b14ef3d2.pdfIn PDF document text
    • https://roxupabepali.weebly.com/uploads/1/3/4/6/134611875/aac77e.pdfIn PDF document text
    • http://itawegan.fun/nonukepunitudoxekosh8c50.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/nasb_study_bible_large_print_indexed.pdfIn PDF document text
    • https://tofariviviri.weebly.com/uploads/1/3/4/1/134109347/4564317.pdfIn PDF document text
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/lisagofor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_601ab67e9c854.pdfIn PDF document text
    • http://rocketdocs.us/kajebonarewobisipuduposj23w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_603ea95e74e67.pdfIn PDF document text
    • http://francobusiness.com/altec_lansing_waterproof_bluetooth_speaker_manualobzw2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_5fe64ec6ef19e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5fefe4df2ae80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_603c579980bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_602b7a0199bf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_637744df51904a90b0e992617edc722c.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_4401ee205a4044bfb355ea712b5ba569.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_3ec26eb3e7a543c3b1444baca0b66d3c.pdf?index=trueIn PDF document text
    • http://dapibudajemuk.atwebpages.com/boss_dd-3t_review.pdfIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/38213611724.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_298a1c742f854c3ab77eb1fca1785421.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_f0f54d0f96a44a42964abc53f449f512.pdf?index=trueIn 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_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 5412 bytes
SHA-256: 0169d32694c1d390365151c47214204f48a1b90c30591674f95745f81a49e242
font_01_sfnt_off00010d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5F 11108 bytes
SHA-256: 4738533b6a5a0c2e8f28132ea320d70b3bd6388eaae99b97efdd011ff8b93540