Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be6802acf8b2492…

MALICIOUS

PDF

73.7 KB Created: 2021-01-25 07:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6cb210b709a59a44009bcd65b408821 SHA-1: 9037680b9442e4e21cb76197d80fd40265ca32af SHA-256: 1be6802acf8b24928daefaa91b65017bb5f6407b4a413e3720b23fb9af4ebfd4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple external URIs, with a primary one pointing to 'traffnew.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation or credential harvesting.

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://traffnew.ru/aws?utm_term=bleed+for+this+parents+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5fe28904aa817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458854/normal_6008b5ed2fbe6.pdfIn PDF document text
    • http://drilltech.info/zagutapurubxrfhw.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/dosadafikidele-rofuvi-vifajatutinol.pdfIn PDF document text
    • https://sererepe.weebly.com/uploads/1/3/3/9/133999843/3960070.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/titafen-sazijegetaneb.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/behringer_c3_microphone_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibowaxus/Qiggcgi/bivalilipod.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/GhhjgM1/bududukavipanepuwuwo.pdfIn PDF document text
    • http://madusotiju.22web.org/mayo_clinic_cardiology_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/idhbnjf/zolaxuxafenisakubow.pdfIn PDF document text
    • https://sujanumijixedi.weebly.com/uploads/1/3/4/5/134501714/kokiwelomuxu_molonido_fedovujan_fofozepon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexojowal.epizy.com/payment_management_system.pdfIn PDF document text
    • http://gobofitis.epizy.com/98844335483.pdfIn PDF document text
    • http://nimozan.epizy.com/zojazevivivi.pdfIn PDF document text
    • http://kipixuge.epizy.com/welivaxaxifopelosubexo.pdfIn PDF document text
    • http://nigukeja.epizy.com/guidestar_nonprofit_report.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_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 5352 bytes
SHA-256: f0c089aa4524908b1adb659b82b2729293feeaf268c183174db8b858c99c702b
font_01_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 10128 bytes
SHA-256: 072016bf70f4aae25978bd681aa2ceaf641344c456b5165a1bdc08201e366763

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