Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7363075e6ab033…

MALICIOUS

PDF

68.6 KB Created: 2021-03-25 00:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ca2058f8a9f851dcf796d086430128f SHA-1: 799f460e3b1750e3528c845076e460f368558c80 SHA-256: 8c7363075e6ab033c178c8c7f9438ea26968f7f16fb838e407939bdcf9be8567
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics as a potential phishing or malicious content delivery vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although the document body is heavily obfuscated, the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=chogada+song+lyrics
    • http://bitasifo.22web.org/can_u_use_in_formal_writing.pdf
    • https://cdn.sqhk.co/wirubetena/fyE1ibM/14161047414.pdf
    • https://cdn.sqhk.co/fupupusamun/V5geicv/lefezofaxidikobadidibak.pdf
    • https://cdn.sqhk.co/pazaxefuma/smji7je/monster_hunter_rise_weapon_types.pdf
    • https://cdn.sqhk.co/vabalogu/ibwighe/your_smile_is_so_beautiful_quotes_for_her.pdf
    • http://serikanipesemo.iblogger.org/total_war_three_kingdoms_liu_bei_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/665e6e11-542d-4244-aa4b-a4a31fb6154a/new_yorker_magazine_customer_service_phone.pdf
    • http://kunasajijujaf.rf.gd/72086946092.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_826f700b3d8343c59e060e7e1cc50ab5.pdf?index=true
    • http://rixuweba.rf.gd/are_dewalt_brushless_drills_any_good.pdf
    • http://rovuwuruw.epizy.com/fupitusunom.pdf
    • http://xoxozuzupa.rf.gd/hp_laserjet_p2055_parts_manual.pdf
    • http://devugagevubuz.rf.gd/utmost_wealth_bond_withdrawal_form.pdf
    • http://suferipuwa.epizy.com/59231170003.pdf
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_73b84cd29ac9400d987e542e48c90882.pdf?index=true
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_b59d3dbecb254d0aa212b999b05dc934.pdf?index=true
    • https://86860ce8-2957-478e-97c3-2abddc2d2c3c.filesusr.com/ugd/754ed1_732bc37742fc4fdbb894913127182d1b.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_17f95d1d2fee4506b6aaf78f7f552821.pdf?index=true
    • http://xajofad.rf.gd/67271229394.pdf
    • https://uploads.strikinglycdn.com/files/670b2082-a18a-4a9a-b4a4-43353446a534/libros_de_fisica_general_para_bachillerato.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_off0000d102.bin
0769cdab97f323b46ac6336dbe546f0259ba3881eca9cd6ead406b9edf611236		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD102 5208 bytes
font_01_sfnt_off0000e2b7.bin
425af78b7adc4f896215f3cb91752081cfe67978b876b47d290f72722cee5275		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 10456 bytes

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