Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ba4237c65181b4…

MALICIOUS

PDF

76.6 KB Created: 2021-06-03 11:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcad9c7aabc5d0ec4d7ae995ead4fc1d SHA-1: 7e6d2804d55d021f3c1ac2b2e7136f810ef6be1e SHA-256: 59ba4237c65181b427631a9569ed1d2482d43f64118dfbd7ce64339294206146
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and urgency lures. The embedded URL https://baarspo.ru/123?utm_term=zoosk+account+on+android is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and malicious detection suggest it may contain embedded JavaScript or exploit code to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://baarspo.ru/123?utm_term=zoosk+account+on+android
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/vifafidezaverojub.pdf
    • https://ridomepu.weebly.com/uploads/1/3/4/3/134305579/237e8881c12b.pdf
    • https://cdn-cms.f-static.net/uploads/4457320/normal_6015f3c3e4cf3.pdf
    • https://xizadaxegux.weebly.com/uploads/1/3/4/5/134512129/tukanuvat.pdf
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5fe483c60b066.pdf
    • https://pebizadovabunal.weebly.com/uploads/1/3/4/7/134711288/9ab48fededc9a.pdf
    • https://cdn-cms.f-static.net/uploads/4385413/normal_60328bb97ac3d.pdf
    • https://xixodojele.weebly.com/uploads/1/3/4/3/134375941/9773186.pdf
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5fd250f2c16e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mudowomuxexo.pbworks.com/f/sokanub.pdf
    • http://nipekari.pbworks.com/f/geologic_timeline_worksheet_answer_key.pdf
    • http://pagorevet.pbworks.com/f/mashed_cauliflower_with_instant_potatoes.pdf
    • https://uploads.strikinglycdn.com/files/860ca221-a5f7-4a09-86ba-f0724d6bf0e9/what_is_the_opposite_of_monster.pdf
    • https://uploads.strikinglycdn.com/files/39be5569-00ec-4a73-8de1-8b702f78aa48/what_instrument_is_used_to_measure_air_flow.pdf
    • http://gabekujijud.pbworks.com/w/file/fetch/144538890/84968381290.pdf
    • http://newubotadov.pbworks.com/f/86044631797.pdf
    • https://uploads.strikinglycdn.com/files/f882e62c-eb8c-457e-af80-10519b2c60ae/what_are_the_5_intermolecular_forces.pdf
    • http://zajozote.pbworks.com/f/13016575454.pdf
    • https://uploads.strikinglycdn.com/files/acb22023-9a47-4d07-a6ac-45f9df7985df/billion_dollar_whale_free_download.pdf
    • http://wojipag.pbworks.com/w/file/fetch/144413640/24103315903.pdf
    • https://uploads.strikinglycdn.com/files/0f17618e-a738-4c3f-b400-5fdc8bec0529/ferakodu.pdf
    • http://rorazokazog.pbworks.com/w/file/fetch/144504234/c_programming_balaguruswamy_6th_edition.pdf
    • https://uploads.strikinglycdn.com/files/5ad640f4-a536-4454-b7b2-e5a202e872a7/turtle_bay_resort_public_parking.pdf
    • https://uploads.strikinglycdn.com/files/d28a8a4d-f605-4b19-90d2-136a68780840/42202057592.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_off0000f135.bin
0c3b0e1a40fa93857a4c80c50b058ecc483d87360f51a25ee24196487ab2288a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 4924 bytes
font_01_sfnt_off00010205.bin
1b70cd48d5108ab3c5c864269f3f54f668409b6d3bb26cc2e368af515bd9c925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 10264 bytes

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