Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce75f93a9be7aec7…

MALICIOUS

PDF

68.1 KB Created: 2020-11-25 05:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f98a60864385e79722df8e5c05226ad1 SHA-1: b3e8bbb3e171024ee11516978255e572f34ab544 SHA-256: ce75f93a9be7aec73a819521cc1e407b7a48a5b3ff1f1d8086f669d03e2b8788
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The embedded links point to domains like 'ggtraff.ru' and numerous 'weebly.com' subdomains, suggesting a link farm designed to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=exact+answer+using+radicals In PDF document text
    • https://tilejawerez.weebly.com/uploads/1/3/4/7/134709016/gulifijexesiset.pdfIn PDF document text
    • https://kigixefowu.weebly.com/uploads/1/3/4/4/134496532/bidudupedeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fa49a6b3b77e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5fad2dd100d0b.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/9192464.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://fewugoxozo.weebly.com/uploads/1/3/4/4/134441687/wuxotexevilinin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f913a34a45cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f9fc32b5db82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5fa5719dac7e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_5f9d6c0e932f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fbb708e92599.pdfIn PDF document text
    • https://gixeguxif.weebly.com/uploads/1/3/4/5/134522915/9de5f7df5.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/gedesisumi/turnitin_scores_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/agreement_termination_template.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_off0000c122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC122 4996 bytes
SHA-256: 12e197d353664ab8ee6b188eabcdccd0bb37296406ccdfa023fa8503fcde30d6
font_01_sfnt_off0000d239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 10360 bytes
SHA-256: ed52b616ffe4595c9a99291a2220c72584f5365c59ad24e8c6e819436f59c003
font_02_sfnt_off0000f5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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