Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb9c78bf1096728…

MALICIOUS

PDF

68.1 KB Created: 2020-12-18 04:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 50cf8a2b6885fd34c318edb12540668f SHA-1: 6c863a5e135edcc2346131bab5fc6d35aaf21b7c SHA-256: 8cb9c78bf1096728083552a6d9482a2c302a2f56534bd81b9c5b37be52f270c9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=ardour+para+windows'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document structure strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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=ardour+para+windows In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_5fb35fea82bd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401712/normal_5fc5cb17a7ff5.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/78c2ee72-07c8-4832-94ca-7eedca58900e/maduxodaximabaraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02d1012-1b74-4622-840e-57c332ff8639/mode_in_real_life.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/kororubulozopujadilokax.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/84089354691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb930397-7d16-4b00-b852-082ba0d812e8/94038534910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5718bba3-c933-4ca3-bc94-26e89ff5f8a4/pokeland_legends_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/jawobofuzixuladisogusuj.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/los_angeles_clippers_new_uniforms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78fbebcf5f06bcb797f70/t/5fcc1cc1d235d37878b4fe71/1607212226959/border_patrol_news_laredo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171f4100-5419-4b79-ad67-dc5b1f1fa0e7/2908236706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc7927b-8ee1-4fa2-9199-8a5104ad7f07/godsmack_faceless_full_album.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/firewire_400_to_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/jejisiti.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_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 5004 bytes
SHA-256: c272fd6bb4d987f900298b3d8f5ed8b47b44fe4d21e65113ba216b87e1457408
font_01_sfnt_off0000de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 10888 bytes
SHA-256: 077952a37f9b48c525adec5e09f382d5353e6e3c3ca3cea0a7a6b34f3ddcbe86

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