Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2a9afa39fea664…

MALICIOUS

PDF

66.2 KB Created: 2020-12-31 03:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 364e2eee4430e7e437585f61342ba2eb SHA-1: 4870f5cbba1f2b95208ef6da3e54a0fc89a364e5 SHA-256: 3f2a9afa39fea664d39707bb6c2797031dff2dd1438a12a983a701f356cc74fa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=worm+of+death+3d'. This URL is likely used to lure users to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware delivery attempt.

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://gettraff.ru/strik?utm_term=worm+of+death+3d In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480412/normal_5fe5f81b3d58b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5fcdceb6b039c.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/cBrJjf5/top_marketing_jobs_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_5fc11dbc8aaf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f891d9bf1477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fe9d8ced4061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494883/normal_5fc6c42912ac7.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/tesotiwapax/34769045718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcced39-f5a0-4d5e-aa18-75f710fe9998/credit_reference_request_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbbb072-84b4-4300-a076-ba4a7b32f390/good_aa_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246b7496-2cda-40fe-b287-1861c5ca3af2/17496301462.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/sleep_apnea_alarm_android.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_off0000c3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F7 5112 bytes
SHA-256: 255d2d9471daabcfb65aaa0c02d3dd24b9b949576fb6b1a5d5b21e44484f2243
font_01_sfnt_off0000d544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD544 11632 bytes
SHA-256: 707b52a02f4f93f6fc3ecd71000836a91784a49cd9b7c31003b64c1281a90a3e

Open this report in the interactive analyzer, or submit your own file for analysis.