Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5df0fb144e01ce…

MALICIOUS

PDF

74.7 KB Created: 2021-03-26 15:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ed156b2c8b35717c2151b3b8189b4c82 SHA-1: f3bf325d6a0c4f1e786dc15ba2d06f27450bb4bd SHA-256: 7b5df0fb144e01ce2af0a8c2188b1589f377839c38ba1ef85aab740d55f2bcec
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a ML classifier flagged it as malicious, with ClamAV confirming it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to fashion jeans, likely intended to redirect users to malicious sites for phishing or malware delivery. The presence of embedded URLs indicates an attempt to direct the user to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=rebellious+fashion+jeans+size+guide PDF link annotation
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/2b1dfeaecf05780.pdfIn PDF document text
    • http://good-production9.site/posavotanobiw1db9n.pdfIn PDF document text
    • https://moxitason.weebly.com/uploads/1/3/4/3/134384587/juvenirenagepexase.pdfIn PDF document text
    • http://trickyturkey.com/zlatan_bolanle_mp4_videoisydi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_6037ea8173925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383917/normal_5ffadb261fe63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500910/normal_604ae63321c8e.pdfIn PDF document text
    • http://firstsecu-paypal.com/xebaw2sdgn.pdfIn PDF document text
    • http://1ux.site/t_fal_optigrill_problemst9h0x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_6041434615981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_603328977bd3a.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/071b0ac7-5ecd-4539-b719-6372516ce154/95701657091.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/selud.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/81461725857.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/fadebozigavojat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4216b52e-9ce7-4003-96da-769ca25e26fc/28910681362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb240fa2-bdf1-40ff-8e7a-081ea9d62e48/herman_miller_aeron_used_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/tencent_game_loop_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8957c649-11ef-4cf6-bf81-7de2e0055347/how_to_setup_a_vizio_sound_bar.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/65101316962.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_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 5348 bytes
SHA-256: efe5f9975a4c7f70ae988c4383e508186034076fcd41b523a70616a2cc22edc3
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 11068 bytes
SHA-256: e59da718072ab59d2ed1c778512811846ebe2b279992b0b1ac1e141840d51eee

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