Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb29b5e1ed4deba…

MALICIOUS

PDF

64.6 KB Created: 2020-11-16 23:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1b0dbaf7927230a517868ce7ce7658b8 SHA-1: 16905fb072567ccdf0f2991f55c28b90d636a42f SHA-256: adb29b5e1ed4deba3f71013a7a59b574f42767d6b86eacee762f3bcf6cd3b975
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate that the primary function of this document is to act as a lure, directing users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=french+tip+guides+diy PDF link annotation
    • https://fanunidepaz.weebly.com/uploads/1/3/4/4/134474969/9451acefd1d53.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/30e20.pdfIn PDF document text
    • https://bovexojegej.weebly.com/uploads/1/3/4/4/134481742/tuwabemefezoni-dubagidixigifi.pdfIn PDF document text
    • https://lukozosa.weebly.com/uploads/1/3/4/4/134485969/kukufaronozewa.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/137ddcd91086.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/3904243.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/8598f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f9e40be33823.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/4d3418a41a.pdfIn PDF document text
    • https://gowewibejeji.weebly.com/uploads/1/3/4/4/134481286/574e1379a7d49.pdfIn PDF document text
    • https://dodojojika.weebly.com/uploads/1/3/4/5/134503072/7536667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_5f9272d9d23ed.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 5152 bytes
SHA-256: fdb8237375a74feff45481b0e3a58d76f01b825dc9d30d2713ec8fa4dde0c9f8
font_01_sfnt_off0000d273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 10596 bytes
SHA-256: c6205ce3f71ced80ef3f2cb49cf7bdb767c7b54bb4eab83ddad33ba9c1740d05

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