Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6264ab5b833b3b…

MALICIOUS

PDF

90.6 KB Created: 2021-03-25 06:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2163b865281d4a45ae8d425631ff8ee9 SHA-1: 73f88b045043b39dc1d630b14df33f3e4669a4dc SHA-256: 4d6264ab5b833b3b39febbaa9d13877daa9cfca889c5bd8c929c81c9e4d3472c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results. The primary URL, 'https://golowaki.ru/wix?keyword=nissan+forklift+operators+manual+pdf', is presented as a search result for a forklift manual, a common lure for phishing or malware distribution. While no scripts were extracted, the PDF structure and extensive link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/wix?keyword=nissan+forklift+operators+manual+pdf PDF link annotation
    • http://tadugebakonuged.getenjoyment.net/penyebab_jantung_koroner.pdfIn PDF document text
    • https://fomuropuzukamu.weebly.com/uploads/1/3/4/7/134728801/jukakepulegif.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/the_giver_chapter_1_summary_and_analysis.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/koxoji.pdfIn PDF document text
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/cd658e1a3532c.pdfIn PDF document text
    • https://bafosuronam.weebly.com/uploads/1/3/0/7/130738527/kefolorufofe.pdfIn PDF document text
    • https://nuxagaselupig.weebly.com/uploads/1/3/4/0/134016775/seralerenuzix.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/wubutoridoziresidipijek.pdfIn PDF document text
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/gapijuxuxegugeguzej.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/dce32f7c-e83e-4c4b-96ae-b0cb7807f429/zatedodog.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/kijaxodewamelil.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_dd1569689c50493a899dbe4428902597.pdf?index=trueIn PDF document text
    • http://robavuk.rf.gd/aptitude_test_for_class_9_cbse.pdfIn PDF document text
    • http://vetuwuw.epizy.com/air_circuit_breaker_abb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a35212-012f-4d86-86dd-cf30f1c6c21c/dakijovose.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/wayfair_formal_dining_room_sets.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_207a01eaa7984b79b4a70a16f47fd815.pdf?index=trueIn PDF document text
    • http://lijowavatajo.myartsonline.com/famous_spanish_classical_guitar_players.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/letter_s_snake_template.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_08334032f16e4f5783050dca5b024124.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/473bf149-e8e9-461d-8eb9-4b35c337f3b7/6467657733.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_0c29259dea414156b2f806b29bec55e2.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_abc12403f2024a75a07ef732c2998932.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/public_sector_capability_framework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7095a5d-166d-4ebf-a240-89b3286468c6/nozidifux.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_off000126a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A1 5220 bytes
SHA-256: c67ac094833025cd60827d4df912d3d3aebb228a906cedad41df0bc6fcf3d18a
font_01_sfnt_off00013857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13857 10664 bytes
SHA-256: fdfb9d5222d7d5a94722b6fde7812e312652262df826e9f99614e8ca7ba8889e

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