Malicious PDF — malware analysis report

Static analysis result for SHA-256 6645b0149801de20…

MALICIOUS

PDF

77.2 KB Created: 2021-01-18 18:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1718fe51aacde968775f7d0539a88d21 SHA-1: 4fd1e96de80cc406b49c592c8324908cbf853e4a SHA-256: 6645b0149801de20970362f0c60af198aa037f3f2d15655dad7d415ac1a40ece
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spamming operation. One of the primary URLs, 'https://traffking.ru/wb?keyword=meter%20reading%20app%20android', suggests a lure related to a meter reading app. The ClamAV detection and ML classifier strongly indicate malicious intent, likely 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://traffking.ru/wb?keyword=meter%20reading%20app%20android PDF link annotation
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/8371003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469850/normal_5fef3d08c6a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5faf39fe9f0a4.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/1525841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fe76df0e46dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417644/normal_5fff3272e5eab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499660/normal_5ff23c12dfa6b.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/2792785.pdfIn PDF document text
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/850550.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/3698238.pdfIn PDF document text
    • https://gojodisob.weebly.com/uploads/1/3/4/6/134664442/1954024.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://s3.amazonaws.com/tokafanawa/duckduckgo_vpn_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/84606240516.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/alexis_de_tocqueville_5_values.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 4708 bytes
SHA-256: 29041274868c5cb1960d7d049037c6fe8680a07d80c0c4415904083039b85012
font_01_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 10744 bytes
SHA-256: 73ca1cc947f0c694bc93cae63ebccaeefe7776aaf69044a1f9e344e43bce8af0
font_02_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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