Malicious PDF — malware analysis report

Static analysis result for SHA-256 6837a5329cec091e…

MALICIOUS

PDF

80.8 KB Created: 2021-02-15 01:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f7ec4d23cfcd3570ea0e16e3318ba51 SHA-1: d416e863f01a88ac7c3dfce1fd488920329ccf08 SHA-256: 6837a5329cec091eb8be8a7b63929e8dc3684ba66cd26c5ab38a92d4067132e9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=bittorrent++mac+free PDF link annotation
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/vofopa.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/177406.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/3888811.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/b494b27a.pdfIn PDF document text
    • https://revixapega.weebly.com/uploads/1/3/4/6/134619396/1331687.pdfIn PDF document text
    • https://werukubafufu.weebly.com/uploads/1/3/4/0/134000234/1617767.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/0c3a5.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/7532377.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/c3590c04.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/penokilunudafinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zurovajij/56932491713.pdfIn PDF document text
    • http://wutagokavejeve.rf.gd/garage_sale_pricing_guide_2017.pdfIn PDF document text
    • http://ginozegi.epizy.com/68174334450.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/ableword_editor_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/30795294188.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/5298276930.pdfIn PDF document text
    • http://jaxuziwemulogel.rf.gd/85464219624.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/sotufolileje.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_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 4864 bytes
SHA-256: 0d12826c5bc02c7c224d2e219d9327514d3704eb8809301b5930cbc13a200bce
font_01_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 10844 bytes
SHA-256: 43dd7e697db75b682b66f5d9ae9ef4e5b502a4474fd217af2493d2918a543add

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