Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c991caa3897ac7…

MALICIOUS

PDF

78.5 KB Created: 2021-03-11 17:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c5fa9f623531849d9328b2287544e5a SHA-1: 2824c212a2f25793d3704af0afce0a834ab59384 SHA-256: a0c991caa3897ac7729575834a71eed2e141c84ceb2321a302ca732aa17ccae7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by heuristics and a machine learning classifier. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The embedded URL likely serves as a lure to a phishing site or a download location for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=club+laga+pittsburgh
    • https://cdn.sqhk.co/vakolitakap/uMoifeR/tavotixuzuvidoboja.pdf
    • https://cdn-cms.f-static.net/uploads/4405190/normal_601d94ddc2c8b.pdf
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/veloxuwupopa-nebutoxuz.pdf
    • https://static.s123-cdn-static.com/uploads/4382189/normal_6002c62985cb9.pdf
    • https://cdn-cms.f-static.net/uploads/4417314/normal_6048607f4829d.pdf
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5feea050f41c4.pdf
    • https://cdn.sqhk.co/nuxoporerom/hezhcZH/71383127858.pdf
    • https://cdn.sqhk.co/sotatixorawi/2gdihgg/zig_zag_railway_track.pdf
    • http://siwosupegejolop.medianewsonline.com/vitetejanebedajobamomo.pdf
    • https://cdn.sqhk.co/jizuxadif/aHOyegc/neon_car_wallpaper_hd.pdf
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/5267014.pdf
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/79cdc3ede5.pdf
    • https://cdn-cms.f-static.net/uploads/4417309/normal_6031ca53634fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sajoveguduv.onlinewebshop.net/dixie_chopper_silver_eagle_2750_oil.pdf
    • https://uploads.strikinglycdn.com/files/7d0eabc5-57f7-4c52-8565-534c024dd52a/nigizovirixotabufefurija.pdf
    • https://uploads.strikinglycdn.com/files/42fd5049-e872-40b5-826b-171a42e235fd/costo_software_adobe_premiere_pro.pdf
    • http://purezaviwof.myartsonline.com/best_part_daniel_caesar_sheet_music.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_off0000f8c0.bin
7f00cba376da241f4ac43d8b443b833badcd170f52a0e1cefdb0a9d15919c474
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 5124 bytes
font_01_sfnt_off00010a1e.bin
4b3c171e49175d385fcf6863986567fd13ef20e7bfef886573511c2acd7cebe1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1E 10204 bytes