Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b6da96a58e504f…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 08:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e6e2ba910d700f2a76c805e3b0327524 SHA-1: ed97773551978be4490bbb9cacacf578c600c0fa SHA-256: e6b6da96a58e504fd4a36730821aaaebb6b7705fc23cd7c117918dfa282b739d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation scheme.

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://mezovuduw.ru/wix?keyword=deped+calendar+for+2019+to+2020 PDF link annotation
    • https://fitelibisubun.weebly.com/uploads/1/3/3/9/133987071/kipided.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/southern_keto_cookbook_barnes_and_noblekidwi.pdfIn PDF document text
    • http://foyou.store/42626952356bl7em.pdfIn PDF document text
    • http://presalle.xyz/rejevowodubali4x15a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fd9188518cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_6021a66bdc7c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5ffcd3ab2d525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_6003cf5f3da64.pdfIn PDF document text
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/f3aeee1.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/1108318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_5fedb8ace0db2.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/7772672.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/texake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_1a950c0d577b4c64a0544384f5e556ea.pdf?index=trueIn PDF document text
    • http://woxutonugosafer.epizy.com/56581982881.pdfIn PDF document text
    • http://sibijexobesu.epizy.com/18210358819.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_a5956352c0ab4493b2bcd9df888cc64f.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_7ba052135d90491393c2b1c8c55c8c26.pdf?index=trueIn 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_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 5452 bytes
SHA-256: 3b9429356760ca93df32a61ecfada381c5d8c9ab99a7833e7964d7fa552ac24e
font_01_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 10736 bytes
SHA-256: f1219abe81ae641776741e31c10dfdaf2fb9b51577c39283d83142cbc2cb570e

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