Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e58b69e0af9aac…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 12:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 8ebd68326f59ad6f228c4cef80cdbc6d SHA-1: ef53893896c53a32a6443a284c8e1b2d7b25b3f6 SHA-256: 75e58b69e0af9aac9cc8719c59c15ded9e96e615e508aaea18c376730098a2e6
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous distinct hosts, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://serikanipesemo.iblogger.org/publication_525.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_60129554052c9.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/jepivogiwitaralegeromo.pdfIn PDF document text
    • https://cdn.sqhk.co/fokigegoma/ij4jghb/venoxovokef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5fcede45f108e.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/what_age_rating_is_tokyo_ghoul.pdfIn PDF document text
    • http://wijuviniwak.iblogger.org/friction_force_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/s0idz3s/4liker_app_new_version_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/giegjGT/mini_snake_drain_opener.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/heWXejc/download_game_drive_and_park_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/jahhRib/20401380122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fe8918b21869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=hugo%20wallace%20weaving%20net%20worthPDF link annotation
    • https://s3.amazonaws.com/tanikanaw/abandoned_bride_nigerian_movie.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/advanced_english_arabic_translation.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/supasujerozuzu.pdfIn PDF document text
    • http://kuxugisabuvifaf.rf.gd/88426785751.pdfIn PDF document text
    • http://vajonaz.epizy.com/btc_wallet_apkpure.pdfIn PDF document text
    • http://biboxafidalus.epizy.com/toloribekesi.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/inmate_information_handbook_federal_bureau_of_prisons.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/nomenclatura_alcanos_alquenos_alquinos.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/25706024820.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_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 4996 bytes
SHA-256: 8c60de7a448b19f54e346543e44dcefcc0c515b8b985349709cacfac92ae3909
font_01_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 10568 bytes
SHA-256: 5255133664d3c1839059368445b86cd56455921a643dcffe1fe339a71864bb0d

Open this report in the interactive analyzer, or submit your own file for analysis.