Malicious PDF — malware analysis report

Static analysis result for SHA-256 3726702613e439a0…

MALICIOUS

PDF

91.1 KB Created: 2021-01-20 18:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57bdb73cdc31b37ab219f395d00415a4 SHA-1: 940c3146d9b003820515d779bc57432c64019da1 SHA-256: 3726702613e439a0a26c95859420fc27ee6e22613ab3899dc15c26d9f28814cc
156 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 0.9992

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 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.
  • 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://traffnew.ru/123?utm_term=plural+name+of+grief PDF link annotation
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/nisemejowejir-vegaw-rilizikalinevo.pdfIn PDF document text
    • https://buwenesuxunuga.weebly.com/uploads/1/3/4/8/134883777/92975255b804b90.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/eN1ghCT/world_youth_bowling_championships_2018.pdfIn PDF document text
    • https://zududebagulakes.weebly.com/uploads/1/3/3/9/133997448/sonuwi.pdfIn PDF document text
    • https://wepuporo.weebly.com/uploads/1/3/2/7/132741302/9987338.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/lTih2ii/rujijemupamizilir.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/rodedixudetimedisu.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/434f6.pdfIn PDF document text
    • https://xefinaloze.weebly.com/uploads/1/3/2/8/132814425/zunowad-jetimuvug-kisolukipimel.pdfIn PDF document text
    • https://vufofameti.weebly.com/uploads/1/3/0/8/130874118/zemudufuva.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/h1cifgd/eso_dragonknight_pve_build.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://bukarujinadir.epizy.com/algebra_1_benchmark_test_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/842815851.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/calculadora_financiera_casio_fc-_100v_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/food_cost_excel_sheet.pdfIn PDF document text
    • http://tuninedup.epizy.com/numberformatter_php_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/videoshow_pro_latest_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 3388 bytes
SHA-256: 450ff554bb01dc052058724df83cffb2b816fc6b4a1df352404e15de355db9cd
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 4712 bytes
SHA-256: 3457cf40a100893492abdbad00a1a909daad9425ea31fb31fb7bc90e5fdbed58
font_02_sfnt_off0001067e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 1648 bytes
SHA-256: b3bf58635a6616fd2d8175ab3fbe708eb5bfca77e3127467f16db21786c1078b
font_03_sfnt_off00010ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC9 13052 bytes
SHA-256: 3d4c9b60209bedba7f0986e151a28604ecf4837a4efb371c68d809dd5c1e5094
font_04_sfnt_off000139b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B6 16336 bytes
SHA-256: 21d037f110da23e982bf9253fd7990eb6da94ae3c6071a2eaceede8dc35a7ba5
font_05_sfnt_off00014f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F91 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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