Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da548acf184f8d0…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 17:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 241e91dc66b47cba948f7ebef7ae30d6 SHA-1: a3eae596c1236d707fcd3e032acc9dfc7d913c82 SHA-256: 7da548acf184f8d0816c714ad411258919df901e6e43f147e498de946750a258
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to drive traffic. The document body, though partially corrupted, suggests a lure related to operating an electric pallet jack, which is likely a pretext to disguise the malicious intent. The presence of ClamAV detection and ML classification strongly suggests malicious content, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://botokaw.ru/strik?utm_term=how+to+operate+an+electric+pallet+jack PDF link annotation
    • https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/vowozoxuj_nazujozo_bipolaxami_kupafe.pdfIn PDF document text
    • http://golixudib.mypressonline.com/birds_papaya_ex_husband_jay.pdfIn PDF document text
    • http://didegubopefu.22web.org/youth_ministry_curriculum.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/game_of_thrones_season_2_episode_10_plot_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fcc0894ee649.pdfIn PDF document text
    • http://disupata.iblogger.org/mepuwogoxev.pdfIn PDF document text
    • http://latujor.22web.org/16600609387.pdfIn PDF document text
    • https://garijonomiwobe.weebly.com/uploads/1/3/4/7/134711127/7f05de484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5ff85a7e1898a.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/jirexolitajo_kazupukepelo_wijegagu.pdfIn PDF document text
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/sitenizujubufifu.pdfIn PDF document text
    • https://batujesidow.weebly.com/uploads/1/3/4/6/134666028/wagajasagodano-wenenabola-mugujazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_cb60e021909f489baf49f176fca46ba2.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_609a35c8712e4df3accaa8c700857f0f.pdf?index=trueIn PDF document text
    • http://valupakukav.myartsonline.com/93317954916.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/8647682814.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/business_development_manager_cv_template_free.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_634e13e453ba47dfa4b23c91e31d13a5.pdf?index=trueIn PDF document text
    • http://bopewexe.onlinewebshop.net/36760071602.pdfIn PDF document text
    • http://tujigukaxez.rf.gd/9225734960.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_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 4944 bytes
SHA-256: f288f85352982dabddb3e0948d6ca891f7929340e91f2ee32c59a243a5edc9e6
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 10676 bytes
SHA-256: 8ed752a58206a6ef82ca74c479b4c7e9076357784c101d659d351c9850b09ebe