Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7ee5ad19a3236b…

MALICIOUS

PDF

77.4 KB Created: 2020-12-21 01:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0333f69a9af796a9bfbca5cb59ad379f SHA-1: 70778369fcfb954762172cf9f5e2e119846dfd19 SHA-256: 0e7ee5ad19a3236bcc58266ccf35f4d15394eaaeed89b2497484d9d2266b6c2b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high probability of malicious intent. It functions as a link farm, containing numerous external links to other PDF documents hosted on various domains, including suspicious ones like 'trafficel.ru'. The presence of many external links suggests an attempt to manipulate search engine rankings or distribute further malicious content. While no scripts were directly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution 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://trafficel.ru/aws?utm_term=appvn+apk+2017 PDF link annotation
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/vizejefejusaluxew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fdac8aca663f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fd67c45b76a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fbfcdb2a2670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_5fd93b3d3c2be.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/656ae8963b3139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5fc5246e4c944.pdfIn PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/dupaxeguxowerara.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/dbbb9fc1fa.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4280b172-1029-4f67-8489-b7a574aac3bf/45444800452.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3e761e25426e1fe3a51/1606284264223/go_math_grade_5_chapter_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/petowefiliwu.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/dolexivimugawit.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fe59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE59 24272 bytes
SHA-256: d383dcad24cf02033a35ea4458302782144100310d2a4e7df4d7e24580db2030
font_00_sfnt_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 5028 bytes
SHA-256: 679db2bd62b938a23d0c8c364806d2a66373a2386d1c41ae3b5ee77328812542
font_01_sfnt_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 11020 bytes
SHA-256: 79baa0178fef0dfb2dc1aa0d2f97c2945817a418b0359b334f9e5128eb643d6b

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