Malicious PDF — malware analysis report

Static analysis result for SHA-256 2615588bb3087de1…

MALICIOUS

PDF

73.8 KB Created: 2021-03-27 11:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2abe62210cf912e7e40dd1b920b5c512 SHA-1: b3291c52500c577f16b4de116499710ee9570f3a SHA-256: 2615588bb3087de1bf9039c3a7d97ea1014a2965073d4d0a15b2f83803f5883c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://fokemale.ru/award?keyword=public+administration+management+pdf', suggests a lure related to public administration management. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/award?keyword=public+administration+management+pdf
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/5161396.pdf
    • https://lebilelumebik.weebly.com/uploads/1/3/1/6/131636833/9374065.pdf
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/gobawutenilos-wiporanaj-jexenukigolep-libavasex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jojitagifuva/xoboxojuzivaduw.pdf
    • https://s3.amazonaws.com/bokofapig/spec_sheet_template_fashion.pdf
    • https://uploads.strikinglycdn.com/files/da5d0d9b-f860-4456-843a-58ea0da7a746/44786238862.pdf
    • https://uploads.strikinglycdn.com/files/365163ed-99b6-4361-b0fd-c59d3ebca3af/how_can_i_make_excel_run_faster.pdf
    • https://uploads.strikinglycdn.com/files/3c455de9-46c5-4ac1-ae12-0426c33933d8/sanyo_crt_tv_models.pdf
    • https://uploads.strikinglycdn.com/files/1e766fca-556c-449c-aa3e-7fb67c2498ab/11695974194.pdf
    • https://uploads.strikinglycdn.com/files/1a1638b5-6f1c-4cf6-964b-66cef9260be6/4861131427.pdf
    • https://uploads.strikinglycdn.com/files/507291ab-68e1-42d2-8bd6-479e9686f235/are_rock_candy_controllers_good.pdf
    • https://s3.amazonaws.com/domegagowevag/71440231091.pdf
    • https://s3.amazonaws.com/fonazuzixagizir/symantec_endpoint_protection_manager_console_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/5299930d-0cfb-423b-8d53-147adf765b7b/bowflex_watch_instructions.pdf
    • https://s3.amazonaws.com/zifilobesumafi/17381310724.pdf
    • https://uploads.strikinglycdn.com/files/f89004a2-3527-4584-8b2c-cfc50fe9c230/buwabalugipefapif.pdf
    • https://s3.amazonaws.com/rezugekolaba/84201181645.pdf
    • https://s3.amazonaws.com/xokebore/bal_hanuman_songs_free.pdf
    • https://s3.amazonaws.com/xajowu/chammak_challo_full_song_free.pdf
    • https://s3.amazonaws.com/pisedij/xitafode.pdf
    • https://uploads.strikinglycdn.com/files/c37c2e43-bcf7-4fa7-8a9b-1227c65cc129/mividusu.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_off0000e0d6.bin
08b95707d4247a4c4d48e387754b457e30efb8e9c85dc80d53081858ba1a232c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 5616 bytes
font_01_sfnt_off0000f3d5.bin
e110efa4c906b0d74c1123f1c1f744a3ac8ba957eb9ee7ceb91672879c9b5a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 11124 bytes

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