Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff384d871f8bf88…

MALICIOUS

PDF

71.1 KB Created: 2021-03-15 12:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1f857ec01aeceaed6c524b52c2724424 SHA-1: fbb6ac3b182a6e3fea3daaaa6ef48d9e53aeec72 SHA-256: 6ff384d871f8bf88301687c1a5f45bc8581dbb3cfdf58b7ab4873eee0fd7dee4
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain associated with phishing or malware distribution, suggesting the document is a lure for a malicious download. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing 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://jacksth.ru/award?keyword=public+relations+writing+form+and+style+9th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379229/normal_6029e0395bc90.pdfIn PDF document text
    • http://alcexpress1.xyz/trombone_jazz_solo_sheet_music_freequevm.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/Uribfgj/rapas.pdfIn PDF document text
    • http://housefashion.ru/14636722035ukur.pdfIn PDF document text
    • https://cdn.sqhk.co/noretokujazo/cSjg1ih/jirutexif.pdfIn PDF document text
    • http://fitit.space/prc-148_dummy_radio_casen95c1.pdfIn PDF document text
    • http://ellmax-site.xyz/31449920364mmfxc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416940/normal_6001cd63717e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_602261b8940c5.pdfIn PDF document text
    • http://copyrighytsupport.com/clean_install_skyrimzqaim.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/009cc591-f417-4d4e-b245-7861a422e462/how_long_do_you_cook_a_pork_loin_roast_in_a_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/kubusosisifilipesuposowe.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/xatozesovobagone.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/chotta_chotta_female_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/spotify_free_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/vsco_full_pack_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/guzuxafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0626c141-f74f-4db5-99d8-dc7204b9980f/lactancia_materna_traducido_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/luxiradavotaxifub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ee65e-1ffc-4c0c-a9ed-d105e9d00f70/canon_mp11dx_tape.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_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 6060 bytes
SHA-256: 31c29e155c3ea8e3226fc0e52064e27c24c8c6b78d5a3b0ef5f459c034dd5706
font_01_sfnt_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 10392 bytes
SHA-256: 7ee0024c2cba86339d24644f0377e2c439f17bf71af3951be46a3a72fce91b00

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