Malicious PDF — malware analysis report

Static analysis result for SHA-256 d894dac63fc4fae0…

MALICIOUS

PDF

77.4 KB Created: 2020-12-20 09:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4fcd42f460c2c633fc663ca5575845 SHA-1: 7559f93dbc83e9e0b7fdf56869708cc5d4fe2fa8 SHA-256: d894dac63fc4fae0f88f1af9d5f2cf6da4e423dc3a2d087be2e5c3d6f7f40556
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to reference game leveling guides, a common lure for phishing attacks.

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://traffine.ru/strik?utm_term=ragnarok+rune+knight+leveling+guide+renewal
    • https://dizugupixaxagoj.weebly.com/uploads/1/3/4/4/134440249/9095030.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2daec3eb3c.pdf
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/566c475588.pdf
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/zuworogubebedisupo.pdf
    • https://kepefiporewe.weebly.com/uploads/1/3/4/7/134704647/rebawawixitofadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f32bea27-655f-4dfd-b905-e0f154487be3/3_point_sling_ak_47.pdf
    • https://s3.amazonaws.com/badodemebo/winrar_for_mac_cracked.pdf
    • https://uploads.strikinglycdn.com/files/69ee0016-dcd7-4d98-9595-103215dadf01/86115237315.pdf
    • https://static1.squarespace.com/static/5fc59cfe2e537a05ef29188a/t/5fcdf3b57ae85b53b2b60b25/1607332789718/70714037021.pdf
    • https://uploads.strikinglycdn.com/files/c9b964c6-e973-4f5b-a5a1-1a008fc369fb/vadojuperojiba.pdf
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fcf8feb0496d067bdd80410/1607438315557/wijezenex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f262.bin
7c6637194d104acfe455ba35426c425dde6763e72e341fae251b6708037646d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5132 bytes
font_01_sfnt_off000103ed.bin
3a104771cc261d1e3ac631fef2acfc756f9e382e7796dcf2179ac0dcfec92073
pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 10716 bytes