Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f657acbdcaf55d…

MALICIOUS

PDF

72.4 KB Created: 2020-11-30 04:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1aa5e1d3a239af9689efa8189c2cbd6a SHA-1: 970f7884621f4336ad456972e6b520c5d747628e SHA-256: a5f657acbdcaf55daa4bd5d1ec774250ed047f932265093e4d95de17dedd74e7
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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=heart+attack+sutra+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fb57cdbd8659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fb256e195a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5fb2a8b0a0515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f88d9115e5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5f98cf4920a35.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/sajatesawodiji/83803256744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e610907a-bcf6-4b66-8a98-18d18d69ca9b/dejamusazobinutap.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/19648059653.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/5066901210.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/audio_recorder_pro_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/home_of_the_brave.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/bazunekuwidazafaruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a08e530-5ed5-44a4-9ee7-eec643a26d3c/riwalirifafo.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/74341820238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e7eea2-9f76-411e-a348-808b7e57b8d3/sims_omen_snowboard_boots.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_off0000de42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 5144 bytes
SHA-256: ba049ac90f5a491d71de6644c7142becbd0375142111531438363c31da8348c4
font_01_sfnt_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 10900 bytes
SHA-256: a8af17e8e21c0b6df254a6a8cca02e566e25c909be4a74c6f5ce262393101133

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