Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce35371be29fb22b…

MALICIOUS

PDF

71.6 KB Created: 2021-03-12 04:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c93504d974f079761c2d8310caf7f964 SHA-1: 0e198dfbaaf6d0f566fdccb13c6c68e99c1eb965 SHA-256: ce35371be29fb22b9986379b0e715d5a3ed18b166ecf6fc991a602dd28f04fe2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URIs points towards an attempt to lead the user to a compromised or malicious site, possibly for credential harvesting or further payload delivery.

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://ponafet.ru/award?keyword=pathfinder+pawns+bestiary+box+1+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5fec68573aeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_600c1f2224c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491437/normal_6023423eba603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_602012944443c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_5fd6c2a2a9a64.pdfIn PDF document text
    • http://bexukitekivotap.22web.org/57460364173.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/phgcdPK/88796889861.pdfIn PDF document text
    • http://penexej.mywebcommunity.org/gesevil.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/chHxig4/mepowodusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_60141b3d153fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_601f2ca6719df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_696d5577c6764046a0907315cf0de8b8.pdf?index=trueIn PDF document text
    • http://fepusum.onlinewebshop.net/verbos_regulares_en_ingles_y_su_pasado_simple.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_0a1969299f4c41fbbb4a850f0b32e3b0.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_9ffe7c039bab464ea1dc9ad66fa7ae57.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_5c53661b361a46f284de9147d7c21fb5.pdf?index=trueIn PDF document text
    • http://vesedakowata.onlinewebshop.net/65367130058.pdfIn PDF document text
    • http://dazulenaredon.rf.gd/pewovobit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 5552 bytes
SHA-256: a05b6bbb9179e3a917e0bc674d739a98442a52d9e0d70f4fcbd55bc06a4093b0
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 10460 bytes
SHA-256: 87ca542924515be1f9b7d6f82150aa271c8c95663c4adfcfdc7190ce2f3cd687

Open this report in the interactive analyzer, or submit your own file for analysis.