Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48903af6468726f…

MALICIOUS

PDF

65.9 KB Created: 2020-11-21 10:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dab39a9bf995058a2ba21c57b8cbea54 SHA-1: 117669fffdefebc4eff798fd293203195a3199d0 SHA-256: a48903af6468726f9022cacfca89c1e97acda63877ff52ccadd153085d28e2a4
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://ggtraff.ru/123?utm_term=marine+corp+survival+manual In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/53581415085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec322216-523f-4bc8-8891-fa819c291e1d/nemuzumabamukojo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/6401173894.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/videohive_mega_graphics_pack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/abraham_twerski_addictive_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28bfa4b3-71af-41e1-8f09-86492c846354/wow_wotlk_holy_paladin_pvp_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e90eb3-8f9b-47a7-b8e9-8b1895fc8a3e/mozonunozumetapaxiwaguk.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/tivi_lcd_40_inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3039182-beb9-4994-b1a8-350df4a056f3/87338348105.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zusebat.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/technology_readiness_level_guidebook.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/bexavavosufejuwebofuzoji.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_off0000c589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 5144 bytes
SHA-256: bd927727689621fe4940dac16531b849b96be50d213600d96aa68ffd6e1de989
font_01_sfnt_off0000d705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD705 10868 bytes
SHA-256: 0af3bae35db1e4d45d17aca6e9adc96fac26398c67bd483ed7a87b79f2abca9d

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