Malicious PDF — malware analysis report

Static analysis result for SHA-256 1021a4d29e99ad58…

MALICIOUS

PDF

65.1 KB Created: 2021-01-06 06:12:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 62968a2cb7aa867501044fd6f9a8df47 SHA-1: 0c14c92890b27e79a2b0b2c2420f7bfdff98ba03 SHA-256: 1021a4d29e99ad585d83058534dd7d5717af6c9e73b7c3049be52b700a58c576
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious link point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=oscorp+information+systems In PDF document text
    • https://cdn.sqhk.co/jabosuve/j2gehbG/flip_phone_verizon_compatible.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/6Dwnmgi/1271463838.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxikotimux/ibdYvjh/downhill_mountain_bike_world_cup_calendar.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/hhDqNgg/61760793301.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/ijahjid/lofutifofonelefezufileri.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/kakekojezutok/phandalin_player_map.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/best_mpg_manual_transmission_cars.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/58418416505.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/87806870.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/jesonebuxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/62792529488.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/54213254767.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/99580102425.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/acer_aspire_one_d257_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_off0000c063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC063 5260 bytes
SHA-256: 444ad79aaf69f4f4694a8a4cf3b9c45485e683ef1f6f33cfa4fecad586c05d1b
font_01_sfnt_off0000d237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 10988 bytes
SHA-256: 2f0085da174435163e76cd449e5af80dce8e12513a7c1597a6feddc70a6879b7

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