Malicious PDF — malware analysis report

Static analysis result for SHA-256 57eda45fda0acd94…

MALICIOUS

PDF

73.8 KB Created: 2021-01-10 03:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05e508dcc61a66a4e7a410db0b4f9326 SHA-1: dbc86f90442600e67492367c70c2b67c6648c9dc SHA-256: 57eda45fda0acd9438e0c5448810c10cda9fd23cf002c197bc995859904cbdc9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=waterfall+chart+template+powerpoint PDF link annotation
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/rumutagamexigek.pdfIn PDF document text
    • https://zidajikivumab.weebly.com/uploads/1/3/4/6/134625594/e6c524.pdfIn PDF document text
    • https://wipugetawunuw.weebly.com/uploads/1/3/5/3/135302850/6040574.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/sezelison.pdfIn PDF document text
    • https://tipuvativojodud.weebly.com/uploads/1/3/4/7/134754547/1399335.pdfIn PDF document text
    • https://gejiraje.weebly.com/uploads/1/3/2/7/132740564/3224231.pdfIn PDF document text
    • https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/bowuzuwutozog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f906977da10a.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/sedazazejufer.pdfIn PDF document text
    • https://gopasijokalurat.weebly.com/uploads/1/3/5/3/135399025/bagebagonijedosuf.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/9155621.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/c52a22d.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/ccaf3577f72dec.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/sinamozagemoger/confined_space_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/62340717560.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 5180 bytes
SHA-256: 495b67a3260052e76e0f42b3ae850ce4057e2527eaee7ddf1de958f5b4f8be68
font_01_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10704 bytes
SHA-256: 2849facebc3ac56dde1bc01eda41089c832d5392961ac392c7d962b699962bf6

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