Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e469fcef314f873…

MALICIOUS

PDF

64.9 KB Created: 2020-12-27 16:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017c08697e583711468d553ef020e8c6 SHA-1: 1e5da21ef9d20b2f516eee3fb7b9a96c8541dc94 SHA-256: 8e469fcef314f8735f3271c83324c5aa7007ef89a570b688233d17da9e409300
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, disguised as a birthday invitation template. The presence of this URL and the strong heuristic detections indicate a phishing or malware distribution attempt.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?utm_term=free+online+birthday+invitation+card+template
    • https://cdn-cms.f-static.net/uploads/4480582/normal_5fbf7ea153661.pdf
    • https://cdn.sqhk.co/widexerun/eiaiamg/thumbtack_for_professionals_app.pdf
    • https://cdn.sqhk.co/linerutinew/KDjjFRk/24311461820.pdf
    • https://cdn.sqhk.co/bojojiweg/gfgdq5U/23276371358.pdf
    • https://cdn-cms.f-static.net/uploads/4393488/normal_5f9f40e99a158.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xutomoxu/word_that_start_with_letter_i.pdf
    • https://s3.amazonaws.com/jukoxisojow/xoberewu.pdf
    • https://uploads.strikinglycdn.com/files/4306b044-1fcd-417c-b455-5fed1f8eb0d2/seat_belt_locking_clip_canada.pdf
    • https://s3.amazonaws.com/pazerogasarinu/gixexivapunopo.pdf
    • https://s3.amazonaws.com/fekazudabo/auditor_appointment_letter_format_doc.pdf
    • https://s3.amazonaws.com/dejazuvorira/chess_analyze_apk_free.pdf
    • https://uploads.strikinglycdn.com/files/d9256544-c4f7-4da8-90ca-2b8a2a9d8447/daquisto_new_yorker.pdf
    • https://s3.amazonaws.com/lupuvogotog/jesunorimumifesiwo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f9.bin
0516da4798aff3a451b87130bc9c1917e904fca0388bd6895b0d840fba3045ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F9 5392 bytes
font_01_sfnt_off0000d62e.bin
821972d032cd5acfb0e0a15f3894d1217f26024e36f6e4142af6a6a61167eae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 9492 bytes

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