Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f1ac2d68f1484b…

MALICIOUS

PDF

90.5 KB Created: 2021-01-14 13:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e560c234854ba82028a49c5ddb1af145 SHA-1: 616b406035d0c1c34f2f1cdc851a9a0ba22cb0cb SHA-256: d1f1ac2d68f1484b6e6461b5f024e3b6345d70cb80c61b1e32886e00da898b9b
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/123?utm_term=jebsen+hand+function+test+pdf'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to classify it as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=jebsen+hand+function+test+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412391/normal_5fcd901f72d65.pdfIn PDF document text
    • https://site-1192612.mozfiles.com/files/1192612/zombie_catchers_2_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/hwVzhaf/38274969102.pdfIn PDF document text
    • https://site-1168140.mozfiles.com/files/1168140/identity_vs_role_confusion_negative_outcomes.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/jjAhahd/bupopuke.pdfIn PDF document text
    • https://site-1208026.mozfiles.com/files/1208026/fun_circus_trivia_facts.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/lakujusitejojet/delicious_emily_honeymoon_cruise_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/discord_bot_commands_source_code.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/29198280012.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/selebakawejegezabagir.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/guidelines_for_hypertension_in_elderly.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/46693553213.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_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 5244 bytes
SHA-256: ef9bfb579818b1a7c413eca553e0dd1542d09ed75b45e30f50b76392eb122d66
font_01_sfnt_off00013627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13627 11964 bytes
SHA-256: 14c1651fbe3ded452cdfbb8351eb8a09c493957fc6e566d5a8914035416bdcfd

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