Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a781ec14329bc4e…

MALICIOUS

PDF

150.7 KB Created: 2021-05-18 17:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2f5e0060054ff90d17b0d6e3c233d858 SHA-1: 2a54623622e40c31ea34d8efeb81c4ef559c8e51 SHA-256: 2a781ec14329bc4e9484a0d00b5f1f3f78dc8a4a68af7b120a9cf437f6602fa2
134 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URIs, including one pointing to 'maypoin.ru', suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=foolproof+module+3+final+test+answers PDF link annotation
    • http://nenotuwafuxigot.22web.org/28789603390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fd8fc3ce3ed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fe035896585d.pdfIn PDF document text
    • http://teniran.22web.org/10350025942.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/korifikixumixez.pdfIn PDF document text
    • http://julajaz.22web.org/how_to_use_acer_projector_without_remote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd1a397528fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_6023bb27237c5.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/6185401.pdfIn PDF document text
    • http://tonozezoziw.iblogger.org/boveb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xufivutuxalug.rf.gd/pat_answer_meaning_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c1cc76-2c5e-41d1-83e2-f1878d5bc89c/xaluxuzejezukisowanef.pdfIn PDF document text
    • http://jimibidubarabus.epizy.com/amado_batista_40_anos_cd_completo.pdfIn PDF document text
    • http://bobosuvediv.epizy.com/lithonia_2blt4_cut_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2acabeeb-8d7c-4067-92ec-d5f32b487f4c/the_stand_2020_finale_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e717167c-bb39-41bb-92a6-6e17b25f9771/scooter_mechanic_jobs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee44bc3-d396-40ed-af72-a0426d4bc00d/xalamokubiwazezafuvafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5e5c09-05d3-44c3-8606-e63b8e9be363/how_to_draw_pid_diagrams.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/91531803239.pdfIn PDF document text
    • http://mowoled.epizy.com/sodulunixesivitobepabat.pdfIn PDF document text
    • http://petegidon.rf.gd/ace_english_book_adda247.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20089 5400 bytes
SHA-256: e6fa15aa254273c486cb9951448fe7c734eba36324a016249705e1dead670d4b
font_01_sfnt_off000212dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212DD 13916 bytes
SHA-256: 0c4cf0e8c592c891b52f5d6d1eb6041599782eb03a48e786fe969e8aee5a11f6
font_02_sfnt_off00024121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24121 2736 bytes
SHA-256: 317e04911f9fbc87efcad06d4792e99b7a721349a2086d3a8011715b67146230

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