Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0503de37a414a5d…

MALICIOUS

PDF

77.0 KB Created: 2021-05-13 22:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d7657a820d3673907e5b6f80737d550 SHA-1: 5191deabaaccdeeb1305bcf09438180eda1872d6 SHA-256: a0503de37a414a5d4e5809ffec25c24e82d084da8a2fc271a362725f06a49cde
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to servicing a gas heater, which directs the user to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users through social engineering, likely leading to a phishing or malware download scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://resalured.ru/strik?utm_term=how+to+service+a+ducted+gas+heater
    • https://cdn.sqhk.co/kojagopomon/gfggpkf/android_studio_gitignore_plugin.pdf
    • http://trokot-new.online/92109222042zeed0.pdf
    • https://cdn.sqhk.co/fumamimed/jjghjjb/dragon_goby_diet.pdf
    • https://cdn.sqhk.co/bitizulokiva/vjfHpLs/rekuvenimug.pdf
    • https://cdn.sqhk.co/simixejazir/jUZqjih/lucky_block_minecraft_pe_mod.pdf
    • http://table-wait.com/catharsis_definition8czg9.pdf
    • http://imedo.ru/9384265578330ud9.pdf
    • http://car-test.pro/kenmore_110_washer_lid_switch_bypassuxzpx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e88722c-e335-4f53-8c1a-1130e6ffb8a3/canon_sx700hs_manual.pdf
    • https://uploads.strikinglycdn.com/files/a2e0eed3-998a-4553-8174-026afe6ffd94/loving_and_forgiving_instrumental.pdf
    • https://uploads.strikinglycdn.com/files/7637742a-c661-4e65-b151-b233a159f082/53749229681.pdf
    • https://s3.amazonaws.com/metubevozisul/lenosele.pdf
    • https://uploads.strikinglycdn.com/files/3e3b784f-c890-4c0e-922c-f0a51fe3ee32/nikon_af-s_dx_18-140mm_vr_camera_lens.pdf
    • https://uploads.strikinglycdn.com/files/c7803834-b063-4bd3-92eb-d392792abae1/51844458707.pdf
    • https://uploads.strikinglycdn.com/files/aeba18c2-c89f-4499-b2a0-1c94abb0a728/64934486795.pdf
    • https://uploads.strikinglycdn.com/files/7bc3540d-3c71-4202-933f-1587ee9b895a/51214021397.pdf
    • https://uploads.strikinglycdn.com/files/8fe14c72-8e22-473a-92ea-88da7d7a5bf7/75150926611.pdf
    • https://uploads.strikinglycdn.com/files/c28e0e37-df81-4375-838a-d89d75caf769/golozodidotozox.pdf
    • https://uploads.strikinglycdn.com/files/d87b5193-e151-4aea-9dac-3e7b75d0d64a/70153717900.pdf
    • https://uploads.strikinglycdn.com/files/f6aff400-9b62-4296-b033-4efe50a40fa8/98479745573.pdf
    • https://s3.amazonaws.com/tobaziw/43558006483.pdf
    • https://uploads.strikinglycdn.com/files/12da93d4-0af5-4f1f-b1de-8f1fb5e1e4da/46277080769.pdf
    • https://s3.amazonaws.com/pewibim/21155907898.pdf
    • https://s3.amazonaws.com/janodojivi/zisorupusinanojubigukudap.pdf
    • https://uploads.strikinglycdn.com/files/768a12b0-332e-4038-bf00-ca1a8e7d39b1/the_game_mens_dating_book.pdf
    • https://uploads.strikinglycdn.com/files/ed8f79d8-7867-47aa-864c-df650e3a54ba/novutapek.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_off0000f0b9.bin
e25795f9b2a45dc120118349f36080cc9264642557cef5bfdd70e558cb225449
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 5280 bytes
font_01_sfnt_off000102bf.bin
79fc373fc87f9c5b60a7bbad9bc5f39dbe181e32a49c038d8f488374ffebf851
pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 10348 bytes