Malicious PDF — malware analysis report

Static analysis result for SHA-256 7928063069787bda…

MALICIOUS

PDF

92.2 KB Created: 2021-03-22 03:35:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88425470407522b12fa3da98e9f08fe4 SHA-1: ba185c01e5259e79afe57791edbc3888ee2edcb6 SHA-256: 7928063069787bda44b2abfedcd5208523ba45f9b9ccac705d52a17c83a0f889
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate documents but lead to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

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://mezovuduw.ru/award?keyword=runtuhnya+dinasti+abbasiyah+pdf
    • https://goxesepejapumew.weebly.com/uploads/1/3/4/6/134609979/16e203d57412.pdf
    • http://pepariravifaza.getenjoyment.net/2020_buick_century_repair_manual.pdf
    • https://cdn.sqhk.co/jadidawa/ighyjbM/tavofusitop.pdf
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/6784303.pdf
    • https://duzopuxezofuj.weebly.com/uploads/1/3/1/3/131382696/4873362.pdf
    • https://cdn.sqhk.co/vavusiwi/XiOZzxR/star_trek_falling_down_gif.pdf
    • https://cdn.sqhk.co/fakineduxafe/dyjgX4s/fresh_strawberry_cake_recipe_with_jello.pdf
    • https://cdn.sqhk.co/bareziwo/ahhjcvJ/friends_tv_show_trivia_quizzes.pdf
    • https://cdn.sqhk.co/ruwonumatag/4kreRTG/path_of_adventure_text-_based_roguelike.pdf
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/bugusa.pdf
    • http://mapugukabazewu.scienceontheweb.net/puzamijisuwisexulumogosox.pdf
    • https://cdn.sqhk.co/petebeki/SqpnhdO/54223950969.pdf
    • https://cdn.sqhk.co/wobuwaseja/hiehcDR/netflix_casque_vr_ps4_sur_pc.pdf
    • http://vikiduxa.mywebcommunity.org/47463169493.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_44c1e7012d7a46b3b48162b8076da3ff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/50d223ce-4556-4c0e-9fb5-645acaedc035/the_art_of_seeing_things_by_john_burroughs.pdf
    • http://bememikat.onlinewebshop.net/cfp_exam_questions.pdf
    • https://uploads.strikinglycdn.com/files/16275b5e-630b-485b-aacf-c75c328d2e06/ncees_fe_exam_prep.pdf
    • https://uploads.strikinglycdn.com/files/5df25d04-e94b-4edf-acd6-ad41e377a2f3/4679909547.pdf
    • http://kugukokoner.myartsonline.com/47534369257.pdf
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_c35809b6b94d4dc2a80c8dcb69903199.pdf?index=true
    • 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_off000120f2.bin
5aa2936e8b9320db2e0acfd5f6eadd588f3ff53ba4a21012893fe17fb43bbeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 4904 bytes
font_01_sfnt_off00013190.bin
827f6f2e8bb6f4ac54aa2b3564dd565d9959009283d6bfa4738bec35e28a2147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13190 10536 bytes
font_02_sfnt_off00015591.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15591 4324 bytes

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