Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5661b03e88138a…

MALICIOUS

PDF

87.8 KB Created: 2021-03-23 17:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 080b0f13dc18dfea68e18848d06b7899 SHA-1: 10578a1671d2befcbd437165e49656f5598c6d73 SHA-256: 2c5661b03e88138a3fcd6d93ab6bed6c1810876501bb75bd539517d308ccf6e3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The document body, though heavily obfuscated, appears to be a lure related to a synthesizer manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=elektron+analog+four+manual+pdf
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fdd31ceea76f.pdf
    • http://kieverts.xyz/48086128393f2d9d.pdf
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/xizogemara_bevabola_ganuradugolej_gumepelo.pdf
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/96ec8decbae6033.pdf
    • http://nubolutlion.xyz/who_dies_in_avengers_endgame_comicpo8t8.pdf
    • https://static.s123-cdn-static.com/uploads/4426543/normal_5ff676747965b.pdf
    • https://kolabonedabisam.weebly.com/uploads/1/3/4/3/134398983/6789532.pdf
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/pafik-jowajanajune.pdf
    • http://tifowarevonet.iblogger.org/what_is_christmas_according_to_the_bible.pdf
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/e970f24b5f0.pdf
    • http://retys.fun/how_to_do_a_hard_reset_on_microwavegr2zh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_04efa5d1c27f4ff0849c25a5314cd668.pdf?index=true
    • https://uploads.strikinglycdn.com/files/73924509-c813-4c32-8d74-5821a83947b3/how_did_absolutism_affect_europe.pdf
    • https://uploads.strikinglycdn.com/files/82b3d1c1-8c42-42f4-b06f-cda5971e2de7/carreras_universidad_del_valle_cali.pdf
    • https://uploads.strikinglycdn.com/files/24e55852-cc52-4a0a-a7d3-30c47dba1fbe/what_is_adaptive_speed_limiter.pdf
    • https://uploads.strikinglycdn.com/files/98fa204a-0118-4391-bfb6-c2fa64f6ecff/jaribogubiwogatofo.pdf
    • http://gimomegujo.epizy.com/65459678455.pdf
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_5674a57ba99447ce823ada8e5b62916b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/32cf4d4a-43d7-4fab-971c-e3ae2262a88f/pazomuwep.pdf
    • http://dibixobijowib.rf.gd/63249797689.pdf
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_6fa1c8273839493a9faedfac5dc72fca.pdf?index=true
    • 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_off00011473.bin
7d251c327342bcdcb230eef4b8a96025ef67dc394e4b70f8c2442b3a68e2a97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11473 5204 bytes
font_01_sfnt_off0001261c.bin
6e829cbedf2007aeb275681ef4f9a7727ca9b6accf46ce1ce262bf207a011507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 12388 bytes

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