Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e452c0cb343be33…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 16:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4feac4e6f5f553fd9e50724b719fbbde SHA-1: 0e05748f0327c2f67d4c556b356a30cc6114d405 SHA-256: 0e452c0cb343be33cf37644cfc23aef6a8c80e7a94c2febbf4576a3f3276020c
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to 'xezojetit.ru', suggesting an attempt to redirect users to potentially harmful sites. The document's structure and embedded links indicate a phishing or SEO manipulation tactic, likely intended to drive traffic to malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+do+you+calculate+voltage+drop+in+a+parallel+circuit PDF link annotation
    • http://vifubavawet.mygamesonline.org/99821590388.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/12721694186.pdfIn PDF document text
    • http://nowatora.22web.org/storeonce_5200_cabling_guide.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/zawusotunolaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fe8069c4d0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_603da6291a9cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_603fd7d4c45eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_6001e2155fe06.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nomibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_f276a425182b4ee2adb2164c7bf2eb9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/futamo/58383964714.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_e77c6064881a45cbac414218ee18dc07.pdf?index=trueIn PDF document text
    • http://dagogedimin.rf.gd/operation_alamelamma_kannada_movie_songs.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_d33f772b752142b9b157b3b289b40ebf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zinudipir/26244475992.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/bride_of_the_century_episode_10.pdfIn PDF document text
    • http://jibavorom.rf.gd/bowmasters_apk_mod_money.pdfIn PDF document text
    • http://voxonirejeze.epizy.com/figubutavubasalivud.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/xijafukufibutifunu.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_0397339cf5624b41bdba44fb924f5796.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_55742ecf980349f98ffaa639b61d8e52.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_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 5280 bytes
SHA-256: aff575fd071ee0f93c7336e03b75fb74e96a9411800535dcda776c55d9cdd11a
font_01_sfnt_off00010c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 11312 bytes
SHA-256: a7ec4b7c7b9fcf54a6ccb757580b398f3ed07aa16e1af4f6a25456c42105d209