Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab03d806d07c154…

MALICIOUS

PDF

81.5 KB Created: 2021-01-18 20:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f2721e21e678fe95a87580074125f1ff SHA-1: b4174cde68f6787dc28370af4e1820d89a740674 SHA-256: 7ab03d806d07c15473566fd8e6470b16a064fa9851cd34d8207dd6c06be40c29
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL disguised with 'bible verses about sexual temptation'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and malicious links strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=bible+verses+about+sexual+temptation In PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/duwuribanot-dibijefami-gopakupi-simonapeke.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/66gjiSg/giweluripodajavidewego.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://bojurejid.weebly.com/uploads/1/3/4/8/134887271/61a12.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/ihOtjdB/fuwanovofodifavitif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satuja/nupeb.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/hangout_apk_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/jazikusiditumisosebidele.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/vuwodorubaso.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/case_interview_secrets_victor_cheng.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/adobe_account_sign_in.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/biwilabonufebijagobew.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/45978211264.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 5164 bytes
SHA-256: 312404832bfb34007254e5ebf5104980b363870cf043e86b486af1122b58d388
font_01_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10808 bytes
SHA-256: ba0cd7610c3209e7d1f85777dc1030073de1b367206341e7062a9af183e0b934
font_02_sfnt_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1
font_03_sfnt_off00012ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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