Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43e5d17fd9adb08…

MALICIOUS

PDF

71.1 KB Created: 2020-12-21 09:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8dcd37ffbcfc657765b80344c841c4fe SHA-1: 14442d91f78ae766a73b22cba76ad0defc04330b SHA-256: a43e5d17fd9adb0810efc68f185bd8b3b675015f03a2c5c2c91e0bc48ea4fc61
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/strik?utm_term=gymnastics+training+program+for+beginners+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/map_of_brodnax_va.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/free_elementary_graduation_program_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55975012-ecbc-4e88-8846-4203a4843966/the_beatles_cartoon_intro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e325d227-8b89-4833-a393-c6f51fddab1e/full_throttle_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/wawezitumepokebu.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/saxofipagarowasepevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/attaullah_coke_studio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/32049592203.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/tovujebug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd34bd7-cfb1-4346-8753-b7e67fa1e5d8/ap_physics_circuits.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_off0000cc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC93 5504 bytes
SHA-256: 115e9ff9c0e186cfca7913036e546392d59539d015368507f044856a31a071c2
font_01_sfnt_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 9976 bytes
SHA-256: 25ae9ee10be00744774e24960c01015531f14c9a503fee19c0ede41f3d2e1cda
font_02_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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