Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0ad644dd43fefd…

MALICIOUS

PDF

81.6 KB Created: 2021-04-07 09:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 664f48245056ed8d8edbcc0fcd877170 SHA-1: edb14787e85ea1a3295ce70be2277503f357ad62 SHA-256: 9b0ad644dd43fefde39a4f51ac40c002c626cf2b59fd57fa7f6486545099fd43
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier further confirm its malicious nature, flagging it as a phishing trojan. While no scripts were extracted, the presence of numerous external URLs, including 'https://pelibifir.ru/strik?utm_term=lowrance+mark+4+hdi+gps', indicates a likely attempt to download further malicious content or phish for information.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=lowrance+mark+4+hdi+gps PDF link annotation
    • http://talinab.iblogger.org/fawemamin.pdfIn PDF document text
    • https://wiwujakibites.weebly.com/uploads/1/3/0/7/130740442/7384286.pdfIn PDF document text
    • https://girigituji.weebly.com/uploads/1/3/4/6/134686745/repenuzuvoduwawu.pdfIn PDF document text
    • https://wubajepetodol.weebly.com/uploads/1/3/1/6/131606368/pamolivobalaj.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/39b54c11b7.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/korusezifewowemabob.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/90cf6.pdfIn PDF document text
    • https://fopizute.weebly.com/uploads/1/3/4/3/134315067/lodarudumikeso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/what_not_to_eat_on_a_cleanse.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/data_sheet_ic_jrc4558d.pdfIn PDF document text
    • http://losalevova.epizy.com/86236242545.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/gijixegofozigadosu.pdfIn PDF document text
    • http://wekidezeze.epizy.com/dumurinozipufarujonomogeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3e68b5-f7a2-4d8a-b2b4-35e753905cb6/traktor_s4_mk1_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9e52a7-78e9-46dc-a828-26b93a58e869/ravpower_filehub_wd03_review.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/fb_messenger_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/loferajizof.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_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 5640 bytes
SHA-256: a0a34ad8fabce5c30336f9e52b6684974523071d0c713dd12213717f0d237451
font_01_sfnt_off00011300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11300 10816 bytes
SHA-256: 73ae1cd3457a857f902f2d1245da3431534aad0b5d2e19876155d88f90756c50

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