Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f1508e1ec2bb9f…

MALICIOUS

PDF

79.1 KB Created: 2021-01-27 13:09:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0634ac1c2edf6ea5f90cd065c23633b9 SHA-1: a342f715a17d1aaf908db40566f0a43990206bbe SHA-256: e0f1508e1ec2bb9fe07ea5eac213d270d8f826db575b0d7b6c20bc22350ddd42
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution intent. While no scripts were explicitly extracted, the presence of many external URIs indicates an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=mw2+mods+iw4x PDF link annotation
    • http://numberoone.xyz/xbox_one_x_specs_fpsv5guz.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/YhbWT6G/93585658895.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/7e9d92ae7b420d.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/my_cloud_home_review_2019x89qh.pdfIn PDF document text
    • http://nazhivy.net/rukavx5h76.pdfIn PDF document text
    • https://kiwosadil.weebly.com/uploads/1/3/5/3/135384828/vokezu.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/Xhcm619/casino_card_game_faro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5fe99d38ceab2.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/Dijw8hh/metal_bottle_tree_stand.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/ey5EgdV/xapapotefikobunedobewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485926/normal_5ffcc1250f5e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fedf0ad9abe7.pdfIn PDF document text
    • https://sibuvavaxo.weebly.com/uploads/1/3/2/6/132681946/bejonewed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fe6e049df8f0.pdfIn PDF document text
    • https://zupelewelasilag.weebly.com/uploads/1/3/4/5/134594614/5991223.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/1887625.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
    • https://s3.amazonaws.com/bikikanafopavu/logesotitabojepubawikite.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/kexofewavozemodezagasuzir.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/adjective_clauses_with_quantifiers_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/xiwunu.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_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 4504 bytes
SHA-256: 3dac42d93629876400a42dba6100d31d80540dce6349060354b7c92dc7a71a7c
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 12424 bytes
SHA-256: ca9769e411869b1d5a564439bd00932279881649abd33bb7d3f1fffeabf7991c
font_02_sfnt_off00012165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12165 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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