Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc75aecc5fde0561…

MALICIOUS

PDF

76.9 KB Created: 2021-03-08 20:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 972657d0bdbed0663f089875bedf65e6 SHA-1: 53f09c4bc5fcd8c8ffadd44e2e46b7020f56b757 SHA-256: bc75aecc5fde056161278d0a9335e73493eb7fbc656e41448a5f4566ec151873
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 0.9998

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://jacksth.ru/123?utm_term=figure+of+speech+worksheet+for+grade+7 PDF link annotation
    • http://numulul.mygamesonline.org/skyrim_xbox_one_mod_load_order_list.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/pokemefizaguvitonejetebaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5ff8b235d0306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5fefd2b41e14c.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/46218958257.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/does_super_shred_diet_really_work.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/21977066127.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/planet_fitness_pf_black_card_worth_it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_6005f7668510a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ginojakoli.rf.gd/99754422482.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_2c4bc902557643d29711c87a14d38962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ximupuv/what_think_win_win_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/17525936422.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_df1ef1f8865c40a88b2d2a3973ce2cf5.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_7ff920f80b3a4465a0ea7104361d4b71.pdf?index=trueIn PDF document text
    • http://pabotojixupi.atwebpages.com/machine_wash_repair.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_ba13209fa9514ff596d3b2ac47f93219.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_ec0c46e94f2b4c0386030a0eba283cdc.pdf?index=trueIn PDF document text
    • http://davutawopoban.epizy.com/refele.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 5352 bytes
SHA-256: b67e95260d400bf6f306973434033f58f2e6faacd0c96529cf04829a52d228d5
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10160 bytes
SHA-256: c41772f364294efb61092f5125778859c84478f0e376950c3b259376a830e715
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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