Malicious PDF — malware analysis report

Static analysis result for SHA-256 7822454c4ca3c01e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 13:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d76d04c8cf5044f4714b65f075f829e SHA-1: e9cb94e5acd0b63ce44ff2d0316a2bdd5ae90af0 SHA-256: 7822454c4ca3c01ef6b8a93726feada79fcc594e1baf95bfc8554a826b43cc21
112 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it uses an urgency/invoice lure. The embedded URL `https://ponafet.ru/123?utm_term=widal+test+positive+report+sample` is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may leverage embedded JavaScript for malicious actions, aligning with T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ponafet.ru/123?utm_term=widal+test+positive+report+sample
    • https://cdn-cms.f-static.net/uploads/4417536/normal_602bb359885f9.pdf
    • http://marudibiwel.iblogger.org/tejunonolejowamidet.pdf
    • http://bekopomulasebi.getenjoyment.net/practical_oscillator_handbook_download.pdf
    • http://vifepixakusuped.iblogger.org/listview_using_baseadapter_in_android.pdf
    • https://cdn-cms.f-static.net/uploads/4419206/normal_5fe6f31d3e88f.pdf
    • http://jotusuwes.iblogger.org/dd_4th_edition_players_handbook_2.pdf
    • http://madoxorijegobe.sportsontheweb.net/jibajosatutuvilan.pdf
    • https://cdn-cms.f-static.net/uploads/4454672/normal_602b602aca716.pdf
    • http://soribowunalosu.22web.org/98593718726.pdf
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fc5ed312163e.pdf
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fc60fb1438f0.pdf
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fcda071cf6fe.pdf
    • http://gukevipagopu.mywebcommunity.org/makalah_obat_antasida.pdf
    • https://cdn-cms.f-static.net/uploads/4468572/normal_60227032e0480.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f018f7dc-c1d1-4289-9257-2d5f6993d145/92589520826.pdf
    • https://s3.amazonaws.com/pulavokaxe/15858208385.pdf
    • http://bokipug.epizy.com/29402421443.pdf
    • http://muvekalufisu.atwebpages.com/jesemisogasupozalabetedal.pdf
    • https://uploads.strikinglycdn.com/files/6e74d1e0-75e4-4f8f-8747-1bdc6ed87605/how_to_play_pop_up.pdf
    • https://s3.amazonaws.com/jaxesabi/nitro_convert_jpg_to_word.pdf
    • https://uploads.strikinglycdn.com/files/c7f93449-00b0-4319-9784-92d9e58a879f/distributed_systems_course_mit.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_off0000f139.bin
ad86fda271f44e698c390e78a3aaf95a9bd3a5f6b184d09cdab7a1079f1b583e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 5180 bytes
font_01_sfnt_off000102d2.bin
781618b7e21ce187f40a53d2201bea40e75afa3d8693ff6742980ba38903cb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 10956 bytes

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