Malicious PDF — malware analysis report

Static analysis result for SHA-256 17be5c8e144bf06e…

MALICIOUS

PDF

79.2 KB Created: 2021-01-09 22:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 93461980143973c2f4e5c3cdfd35b8e6 SHA-1: 9d9c5c4f5690b5461356e1b73010ffa004f97f41 SHA-256: 17be5c8e144bf06ec2a70b9a607d770361a44e4265102560519fcb0f7cead21e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains keywords related to 'Gartner software defined networking', likely used as a lure to drive traffic to the malicious URLs.

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://trafftec.ru/123?utm_term=gartner+software+defined+networking PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411512/normal_5f994dd7a9259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_5faa367a3ae8b.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/faeed4b25c.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/7909144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_5fdb10982e544.pdfIn PDF document text
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/fazapetopifube.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/75c8c09953.pdfIn PDF document text
    • https://fejevudud.weebly.com/uploads/1/3/2/6/132695511/redida.pdfIn PDF document text
    • https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/zomutamatex_dutopuwasis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426816/normal_5fa4444d641bd.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/7803f03.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/pefogotibisu_todarurako.pdfIn PDF document text
    • https://nejuxudukekiti.weebly.com/uploads/1/3/0/8/130874136/375a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 5232 bytes
SHA-256: 931a226295e81279016d4e533c1c726cdf76722d02babebb034bd83825b5cb54
font_01_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 11624 bytes
SHA-256: 6b6b44435b8ce9d4da8bf999b442c272a13e81ee35013f63204af8259ef7e67a

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