Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54a3e4de0c77726…

MALICIOUS

PDF

90.1 KB Created: 2021-04-06 04:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69d56305601adbdba216c932cddc58e2 SHA-1: 7c572d76932773ec7b361834c243fa6ff3fce904 SHA-256: d54a3e4de0c777268c58c9d922f471f2de811a7094863304b81c35b15c980a37
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, one of which is `https://zajinet.ru/award?keyword=konsep+budaya+organisasi+pdf`, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'konsep budaya organisasi pdf', indicating a potential lure. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest a phishing or downloader attack pattern.

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://zajinet.ru/award?keyword=konsep+budaya+organisasi+pdf
    • http://vvinorama.website/stress_management_questionnaire_for_employeesghj80.pdf
    • http://sentytld.online/starcraft_vinyl_bundle5917i.pdf
    • http://lighterusb24.site/harbor_breeze_remote_programming_learn_buttonu519a.pdf
    • http://reduslimitalia.website/nezefalawekejaxiguz8rqjk.pdf
    • http://nanolenka.xyz/bard_s_tale_apk_revdlhviqm.pdf
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/kowun.pdf
    • http://xagevogewa.medianewsonline.com/zujakipupenaxokaxodul.pdf
    • http://molotkov.site/43308137956xls8h.pdf
    • https://fupixadig.weebly.com/uploads/1/3/4/0/134096542/telisejezoluvoko.pdf
    • http://sodahq.club/tonufuzakegoxjuj3j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dubanexotokegel.myartsonline.com/buck_converter_ti.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_b0cd143b1279416a9177f5cff1c8b64d.pdf?index=true
    • https://s3.amazonaws.com/mokuwanibof/new_ethiopian_music_2019_3gp.pdf
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_e7066d57aff2409ca6d4ecd449f6a741.pdf?index=true
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_8043f61b314444dda9531e02fb885c7f.pdf?index=true
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_1f4e79344c32480fb46f02854b276f41.pdf?index=true
    • https://s3.amazonaws.com/dazuxujepov/rodasuguni.pdf
    • https://s3.amazonaws.com/lupuvogotog/how_to_become_a_cia_auditor.pdf
    • http://rivenoke.onlinewebshop.net/54742703056.pdf
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_f5fbaa8826de4848ac78c3a4f99ccfa7.pdf?index=true
    • http://nibemodida.myartsonline.com/27290502576.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_off000123e5.bin
e7273c81f86aea39ebc95292850acab6a8481c8d9188935dabf8f083aa859abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 5388 bytes
font_01_sfnt_off00013650.bin
977ef62fbe0e3f0b98d7cadec9d97ba2ba6a0277fa00af8da9e93f0861beccca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13650 10812 bytes

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