Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb018e90a376045…

MALICIOUS

PDF

75.4 KB Created: 2020-11-20 22:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17e69c9b0064ad7544de132a81ebbf47 SHA-1: 3222e520ec5e0443ef366b19783f0ece96ffb29a SHA-256: deb018e90a376045ccb36cd7498405df54f2b9d64f76b675afc233c7fc7117bc
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://traffking.ru/aws?utm_term=nutrition+information+boiled+peanuts'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://traffking.ru/aws?utm_term=nutrition+information+boiled+peanuts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f917ead9d934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5f962fdf353b6.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/72898fe1-43bc-49c6-9a5c-eba4549a48a2/84079529197.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/badminton_rules_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e16540-b602-487e-a373-bb7ad7e55e1a/irregular_past_tense_verbs_worksheet_second_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd42a55d-a9cc-4591-a322-cf8c96f06d97/38199597384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5565602f-7872-4ba4-a219-2d11b5d0e6e8/motocross_madness_2_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9c0092-e0f0-46c4-9bbd-368c95932521/old_fashioned_peanut_butter_balls_with_coconut.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/chakravakam_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a046af70-b90d-40b1-9359-75f717c055e0/59997723000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ec402d-0288-49f2-ad69-66ded9b40b3f/26882405423.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5296 bytes
SHA-256: 1d2840fa2cc85aa09c96b8abcd0eb00e8dfaf0b8b164639059795019ce286bb3
font_01_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 10544 bytes
SHA-256: df88a6432ac0442c5a8300a80bfe0c384c2436405353d8c310afab6ab36e3890

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