Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c91170c85ff9b79…

MALICIOUS

PDF

83.0 KB Created: 2021-03-04 17:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a3a5fc4e971e007709e3f7704d9f95f1 SHA-1: e3550229dbda564d73d470dd0db46c33173eb776 SHA-256: 8c91170c85ff9b798de1fa143e416bf62ac95f3e9b4a05724c0700295fd2e758
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The primary URL, 'https://mezovuduw.ru/wix?keyword=ingenuity+automatic+bouncer+battery', suggests a potential phishing or SEO manipulation tactic. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=ingenuity+automatic+bouncer+battery PDF link annotation
    • http://sawedes.mywebcommunity.org/1859477262.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/heHgKwj/rudikudimukodupimiluwakog.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/jahigdM/migafe.pdfIn PDF document text
    • https://wanalepawipetep.weebly.com/uploads/1/3/1/8/131857983/9debbd82c8e6d.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/747f4ede.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/38805847903.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/gdEhcie/ultimate_xterran_off_road_camper_trailer.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/girozusuvis_ranijavawamemu_zawebali_turamuva.pdfIn PDF document text
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/8020079.pdfIn PDF document text
    • https://bulobazopikiju.weebly.com/uploads/1/3/0/7/130776241/detamudubapogip.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/jonafunolofutanidulo.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/mazijixozas.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/daxoma-kolosipe-dixidezon.pdfIn PDF document text
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/16fcdd6.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/julajenewalawos.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/attack_on_titan_season_4_episode_release_date_schedule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92ab541-2505-4fe9-8270-3e0273fe8ebd/fl_studio_plugins_too_big.pdfIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/piwoxamesum.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/biwadibetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fb4b79-94bd-4b89-aafc-081c664caa29/altered_carbon_netflix_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ddd348-6ca4-4bcb-9cfc-455a5b0059a4/electric_oil_filled_heater_smell.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/29302924838.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_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 5088 bytes
SHA-256: 1b90c39ffd3c5364070d58a30c2d4be0d432497ce9df454be50af30535b79c4a
font_01_sfnt_off00011aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA3 10612 bytes
SHA-256: c0e20e7bfc58065da0877b95b29566e32e8bc888d80918ac2da0b77bd26b8cb0