Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25b3310551c1602…

MALICIOUS

PDF

88.5 KB Created: 2020-12-24 19:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9e2588495f30a332c15ee3de8416a17 SHA-1: ea023331aefcc837b22deee3b502060785fd5e09 SHA-256: c25b3310551c16028c252bc55c6e26cd0cf8bb8f49015f5a6e3140dae7074619
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The ML classifier also strongly flagged this file as malicious. While no scripts were extracted, the presence of a malicious URL within the document structure indicates an attempt to redirect the user to a potentially harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=harrison+county+board+of+education+staff+directory In PDF document text
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5fc3abff2c1dd.pdfIn PDF document text
    • https://cdn.sqhk.co/tezakagadol/bZxiczI/trans-_western_management_group_inc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fc773545f3cc.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/hhgeife/shooting_bears_videos.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/vesubodufisi/44956486194.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/15862139148.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/larolorobunugemof.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/wudidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3bbdbe-14da-4c00-bf58-32e12c44ec32/rajuzume.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/potaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gonavo/hecu_marine_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fde3a82-daf1-449a-ae12-7a115f96df4d/project_classroom_makeover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0fc3cb-a048-49b7-94df-a71197c57e70/50838243153.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/barkat_ali_ludhianvi_books.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_off00011cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 5188 bytes
SHA-256: 2b3febf450252391041461aff91eda848716f7fca59b1a25b21cf750f1ea276f
font_01_sfnt_off00012e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E76 11888 bytes
SHA-256: 1ab2fec2900b1178c3c7c8374703117c87713ed049a6ffb960b42dd75137fb80

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