Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29c78ca4267cfa1…

MALICIOUS

PDF

79.0 KB Created: 2020-11-19 06:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c7d6d770c731c7d1f0261310b038e4fa SHA-1: 92a3a02d3f235dfa90c46a0178fd6715e6583074 SHA-256: a29c78ca4267cfa198cd7aa6ac38d6274a4e830e700ffc20c900223857d87204
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on disposable domains, characteristic of a link farm. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a large number of outbound links designed to manipulate search engine results or distribute malicious content. The embedded URL and the document's structure suggest a lure to a phishing or malware distribution site.

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://trafficel.ru/aws?utm_term=vcds+17.+1.+3+crack PDF link annotation
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/tapalisizemef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fa75b2c63cd5.pdfIn PDF document text
    • https://nifubadipapa.weebly.com/uploads/1/3/4/3/134388301/04e36c.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/pavupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fa296e744cff.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/e78a0d024.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/jifuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5fabbc938e3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5fa46066d0bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f95343998a91.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/9081469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f90d717a72fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8863f2ad7cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e89334ba-e06d-4c9f-bc28-6657ff03eae9/magic_e_word_list_for_first_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf83954-fd35-421d-b1bf-b2121b392257/nefeweminunikefil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 4584 bytes
SHA-256: 60fcf8bebe867df5103be3c246febe57d3275558b2b837c57145c461642e5df6
font_01_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 11508 bytes
SHA-256: f731a65533a2a04bf205015e3fc1086ab834b5916d6c4ea34e55c02636b7956e
font_02_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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