Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c84ed6893d99b57…

MALICIOUS

PDF

75.5 KB Created: 2020-12-30 23:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 51a3d609664a1b73601935f300711feb SHA-1: e7fda1bcbdf61974650de3bb25accf4bf667558a SHA-256: 3c84ed6893d99b578db850c4f98aeb72257881692e82647dcbd4f03299f3f945
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and identified as part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution via these links.

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
  • 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 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.
  • 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://gettraff.ru/123?utm_term=hp+photosmart+c6280+service+manual In PDF document text
    • https://jimivoxoresovi.weebly.com/uploads/1/3/4/3/134311124/7888433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392462/normal_5fdd18c188a2b.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/bosewelebus-zavogi.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/9031637.pdfIn PDF document text
    • https://babunugigexi.weebly.com/uploads/1/3/4/5/134582988/744181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371509/normal_5febb031d3797.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/MnhcgdT/small_wooden_spool_craft_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871454b1181.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/1241033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b01ae88-5d15-495a-9b2b-798989199c97/39761917750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81c115b-6d01-494c-aea9-eb28cc4ef62c/33671566032.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_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 5816 bytes
SHA-256: 4f536671f70c19bdda21cbc9de10f9ab65b714857d37fac5cc29d53054a326ce
font_01_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 10900 bytes
SHA-256: e4a7a10037c88c86c687b2a7745c017cc62fd8a9261a1b705bb325d19aeeddca

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