Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab11b81c0917d78a…

MALICIOUS

PDF

72.3 KB Created: 2020-12-15 15:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc32b477b09ae67d0ef9f36c5a0d7ce SHA-1: d10ddd71715b9aa8253a16131959ffbeaa0d3e1e SHA-256: ab11b81c0917d78a4465ce36f753e241630a584d04a1ee19fe00cd84cfc1f8c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL and the document's apparent content suggest a phishing attempt to trick the user into calling a fraudulent phone number. No scripts were extracted, but the PDF structure itself facilitated the malicious content.

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/strik?utm_term=gwinnett+water+bill+phone+number
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/5b04ca83cc.pdf
    • https://rifeseroki.weebly.com/uploads/1/3/4/6/134698736/5615244.pdf
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/takawujatikumopewim.pdf
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/lemikunejijel.pdf
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5fcb0caf05967.pdf
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/sejuzuzizatasop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/44251901-f970-4046-a3ef-846b39b49fd1/makeup_artist_resume_template.pdf
    • https://static1.squarespace.com/static/5fced0d5941bd0096f24e15f/t/5fd15944ad61ab58317b518f/1607555397357/watch_rush_hour_2_netflix.pdf
    • https://uploads.strikinglycdn.com/files/0ead7b3a-215b-48a7-b298-29a1146b3311/favabufusebolevipa.pdf
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc998c3fedaa13a485c3ff3/1607047364081/pimipaxonugenerinixisi.pdf
    • https://uploads.strikinglycdn.com/files/b4b946e1-5568-442b-aded-d35acb2bc09a/unblocked_games_gunblood_western_shootout.pdf
    • https://uploads.strikinglycdn.com/files/d4a4d2e3-4f31-45a3-ba5d-3635011d1d84/sixajalux.pdf
    • https://uploads.strikinglycdn.com/files/4bf31ca3-58d1-4b10-98f6-95c4c05207d6/cunningham_fisiologia_veterinaria.pdf
    • https://uploads.strikinglycdn.com/files/bb2fcd74-2852-4a15-a8f1-99f24fd7b362/masemibomopupebilof.pdf
    • https://uploads.strikinglycdn.com/files/88424199-341f-4543-9c11-f4861e31cce4/49822777897.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a0.bin
c03318d33229601138c0566b59db4beb0de2f7bde975c758d642dc494e3c4fba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 5024 bytes
font_01_sfnt_off0000e192.bin
2ac873ac489ea60c3ddff0cc94416e7d161f8a63f25a58eb67931dc71eaaed03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 10676 bytes
font_02_sfnt_off00010621.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 4324 bytes

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