Malicious PDF — malware analysis report

Static analysis result for SHA-256 c341ded5c108bac2…

MALICIOUS

PDF

77.3 KB Created: 2021-02-01 23:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d7b101ef028e51b2ecdc9d7813499031 SHA-1: 9c529376fc4ca76c17705c307692c1e74714ad5a SHA-256: c341ded5c108bac2857d0e6f2140683785797b63d6029ec9d82335cc23157646
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to link farms and disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with exploitation techniques used to deliver secondary payloads or redirect users to malicious sites.

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
  • 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://druttle.ru/123?utm_term=mark+of+grace+grand+exchange PDF link annotation
    • http://xadixul.66ghz.com/ibps_guide_rrb_clerk_free_mock_test.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/nimuberemex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff04c2cdac0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_600b201605833.pdfIn PDF document text
    • http://giocodigital.fun/personal_safety_alarm_necklace518vg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5fff3da9ed72b.pdfIn PDF document text
    • http://pusuwanoxanopo.22web.org/ps4_emulator_for_pc_32_bit.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/1374137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_600a6b395c738.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/wufuninujom-wokani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401976/normal_600541101b9ab.pdfIn PDF document text
    • http://apelsins.space/muwijo9ssst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwojewemuxa.epizy.com/my_singing_monsters_entbrat_breeding_guide.pdfIn PDF document text
    • http://mudivakerimenog.epizy.com/bochenski_la_filosofia_actual.pdfIn PDF document text
    • http://lekozuni.epizy.com/cdc_guidelines_for_syphilis_diagnosis.pdfIn PDF document text
    • http://livukuxuperum.epizy.com/501c3_donation_request_letter_template.pdfIn PDF document text
    • http://pefasadidalaw.epizy.com/99693651628.pdfIn PDF document text
    • http://gorefoverotiw.epizy.com/90647713033.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_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 5208 bytes
SHA-256: 0409cb598f89026ccb243e7d4f632ab741a389af4b1415598ee2a9fd5213c4aa
font_01_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 10884 bytes
SHA-256: f895c29e52479daf5145e635ec934e8e0e5fc7edf00274ff2fdeb45fd6661426

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