Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcefc0ddde2f3203…

MALICIOUS

PDF

83.4 KB Created: 2021-06-09 14:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b324b1fd87875d0ea39509ef204ac0 SHA-1: e0e866e4aa47a82f2f4ebffa9373b8cce93c9cc3 SHA-256: bcefc0ddde2f3203a358d1fc42d746ec62eca0b402115101ca73eb634bfa10c6
104 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 an external URI that is likely malicious. The presence of a download button lure suggests a phishing or social engineering attempt to trick the user into downloading a payload. Although no scripts were explicitly extracted, the PDF structure and the malicious URL point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://allytemp.ru/pbw?utm_term=jeremy+zucker+comethru+download+mp3
    • https://cdn-cms.f-static.net/uploads/4486772/normal_5fdb40de10f98.pdf
    • https://cdn-cms.f-static.net/uploads/4389085/normal_6060147741933.pdf
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fdde117d583c.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/normal_602157fa3cf85.pdf
    • https://cdn-cms.f-static.net/uploads/4495262/normal_6059c8d83b887.pdf
    • https://cdn-cms.f-static.net/uploads/4427287/normal_606e06fd4d8cb.pdf
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fc716106e38b.pdf
    • https://static.s123-cdn-static-d.com/uploads/4447101/normal_60b469cc75220.pdf
    • https://cdn-cms.f-static.net/uploads/4451955/normal_6024076a6fadf.pdf
    • https://static.s123-cdn-static.com/uploads/4469828/normal_60062a8c95c92.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lekipirunezi.pbworks.com/w/file/fetch/144414789/how_long_does_it_take_to_get_a_green_belt_in_six_sigma.pdf
    • http://fokojifidesi.pbworks.com/f/ford_truck_options_by_vin_number.pdf
    • https://uploads.strikinglycdn.com/files/e3771381-7f72-4d36-be71-4d1ef1625127/kulutuzivubuwijuputalemef.pdf
    • https://uploads.strikinglycdn.com/files/72f2a0c9-6e6f-4d36-ac72-2b6d4d941686/what_is_the_moral_lesson_of_the_story_the_diamond_necklace.pdf
    • https://uploads.strikinglycdn.com/files/cc837bba-aa16-4006-844f-6065e53c0ddf/united_states_military_phonetic_alphabet.pdf
    • https://uploads.strikinglycdn.com/files/59ecc431-ded7-493d-957e-504b0c22a963/chess_960_strategy.pdf
    • http://zajozote.pbworks.com/w/file/fetch/144444297/is_raft_still_getting_updates.pdf
    • https://uploads.strikinglycdn.com/files/4c47ef7e-98e7-467b-834e-14d88739d62b/wixomonebixukaxibulul.pdf
    • http://rubepikonot.pbworks.com/f/73576749425.pdf
    • http://piwazufoli.pbworks.com/w/file/fetch/144750594/case_in_point_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2faac93c-0487-472a-87f9-74dbf828fd76/mabuferejuvekamelusivazun.pdf
    • http://watapabipos.pbworks.com/f/sistema_de_ecuaciones_lineales_con_2_variables_ejercicios_resueltos.pdf
    • https://uploads.strikinglycdn.com/files/e72dc8b9-f361-4e9e-a30f-f506f2e4cfe9/juwumidinojuliwizesegugew.pdf
    • http://barumena.pbworks.com/w/file/fetch/144445101/tamonoretilotovudaxexuwix.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de52.bin
a24df4d338b8b29202e8d7f91249f982ff4d72f2c74c3859968c2232e24d4956		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE52 5596 bytes
font_01_sfnt_off0000f156.bin
b8d60406302ba40effa57bcc3a692ac19968734ce6de7f0063f8ae1266e87ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 14984 bytes
font_02_sfnt_off00012110.bin
b27964547718b685b880571db50f632a9309914cd319bab62d9bdfb7f2614a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 18420 bytes

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