Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09723aee0fdb99c…

MALICIOUS

PDF

146.1 KB Created: 2021-01-08 10:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5dfa69d62654ce61bcf269fa63592957 SHA-1: d6d7f32ba9c79bbf79f0a9e308caa840e600544b SHA-256: d09723aee0fdb99c256defd805c883d1954c6d888cf3787ef5abce8088efdfbd
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. Although the document body is heavily obfuscated, the presence of the malicious URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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=scalebreaker+patch+release+date In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f8c3c0c137b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fdd492ec3183.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/hfMkieS/road_warrior_route_planner_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_5fe54ab6127f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480736/normal_5fef8aacc2b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fab37876d302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5fbe75c472a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5ff7ca2c24bac.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jmihggw/28543461335.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/fjgVjfk/60748189943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5f96b77ebdaa5.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/yktzjgD/ballet_class_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f94b3342fc3d.pdfIn 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/19be7a1c-6a1b-4bbe-834f-852f4234dab9/troy_bilt_27_ton_log_splitter_honda_engine_manual.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_off0002026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2026A 5468 bytes
SHA-256: bd534a0c5259d785eef923ad24925b9c4880ffdb845bf65e85ea6a20fc4d7614
font_01_sfnt_off000214f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214F2 11344 bytes
SHA-256: cb9b9964e0378be904ab819516d5979778dbd877cea8dccf329e2b0f5989a11e

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