Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2150a2a298410a…

MALICIOUS

PDF

68.9 KB Created: 2020-11-09 23:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 71241da58a9b95ddfda3c780cb1456ed SHA-1: 94bd1a8488c1fe62e12c0273a388baebea98944b SHA-256: 0b2150a2a298410a1370e1a8c1c11218b292389e90a373cf30236dfb7491ee1b
194 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffine.ru/strik?keyword=the+ambum+stone' is identified as a redirector, likely leading to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=the+ambum+stone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fa855b1ea0cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fa7bd273e2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f8cbf7a5a85c.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/2be329b0-3464-4e0f-8ee2-c12715a7e010/69233739408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebded86a-650e-498a-a8c8-e245539872e8/gisemabedusez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5533b6a1-004b-42bb-a765-92ae5a862f7b/306155930.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/2016_vw_jetta_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9150bb-84e9-4729-ab37-aad068d0b32b/1141592013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275e0d86-d34d-40d0-9fb1-b5060035e128/bivuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/fevam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9211b288-fcb9-458b-94d0-7bf971ebcd04/tupoxirajikodato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e41312-2174-4306-82ca-96b4bef57c1a/57678389211.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 1604 bytes
SHA-256: 14496697e68b4a0f17b25b2d5c2a98c80d187e70e38cf32987288d75605d8b20
font_01_sfnt_off0000d028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD028 4884 bytes
SHA-256: 05dd67d2c868ffe7dbf7e84861a38beae8f7b4d814650ba69e132a84d7c39506
font_02_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 11204 bytes
SHA-256: 89ad9cb533c6d573d6ff1981de90423ab08ac026041df2c170a667bc0966ab7e