Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aad105f0fc8cd72…

MALICIOUS

PDF

69.7 KB Created: 2020-12-23 09:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a8c31898ef49181815271c64f94a6956 SHA-1: b99a766bcb377ad28a5f53885e55f472a798b8ed SHA-256: 2aad105f0fc8cd72f31b0f0cbc266fbb67c236890a107806f4ddd5c18ee88817
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The presence of a large number of external links, including one pointing to 'traffset.ru', suggests a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, possibly involving embedded JavaScript for redirection or exploitation.

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://traffset.ru/strik?utm_term=super+mario+bros+3+gba+emulator+cheats PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367940/normal_5fde85dc1ab1a.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/repal-pezobawug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f924386f2a7b.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/dbed3710ca431f8.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/figibosoforibivober.pdfIn PDF document text
    • https://wajusozoxedaxu.weebly.com/uploads/1/3/4/2/134235608/72303c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446512/normal_5fab7984106ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fb2cc5bea6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fb370feb0d9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc71d931969b523a41ef95e/t/5fd66367313c42342b8d4336/1607885672326/49585147943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b253d2-b2bc-49fc-a8c0-817486a751e1/43364504477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74456f79-1261-4a71-bea0-11920ca82e4b/xetatejibagogumege.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/nobazaluxisaso.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_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 5752 bytes
SHA-256: 34902f75bcca6904abb9e9e72af1598acd5a321c0983400f159025ce9807053f
font_01_sfnt_off0000e45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 10976 bytes
SHA-256: f5fd2fa6be19ac68078675fa0ec4d8b792b76013834aaa19ac1a4706f8e06321

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