Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bcec850d29ddba…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 06:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67891b66ed9395157c4c3a9df651eb9c SHA-1: d8b29c0090d597c363fdd9b1e1312ccefd2538a9 SHA-256: f6bcec850d29ddba1bbe350176d2b1180d70c70dfa61dc6d59eae8ff4c6db756
96 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, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://lozipotod.ru/123?utm_term=legion+commander+dota+guide', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure. The primary attack vector appears to be social engineering via a deceptive document, leading to the execution of malicious content or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=legion+commander+dota+guide
    • http://winoraama.website/brigitte_overwatch_guide_20192xrgs.pdf
    • http://mrshadow.net/kewerovetizipidel7folu.pdf
    • http://tublitalia.fun/54326376306z6w62.pdf
    • http://topukovatawosu.sportsontheweb.net/gumifumenev.pdf
    • http://blue-tick-central.com/legadowinepitezokixishoob.pdf
    • http://bloomwithdeanna.com/printable_paper_rocket_templateefngh.pdf
    • http://mybiol.site/mitel_5312_ip_phone_setuprprm0.pdf
    • http://daating19.site/72338222998rflx9.pdf
    • http://creamwalls.online/dapoxijesufo5773l.pdf
    • http://ulekschool.online/riximibubxntlt.pdf
    • http://nakanilo.club/age_limit_for_army_reserves_with_prior_service56nm4.pdf
    • http://dinesan.iblogger.org/mcdougal_littell_algebra_2_2020_online_textbook.pdf
    • http://ubsvp.com/ergo_360_baby_carrier_manual4n7n4.pdf
    • http://antonioit.space/57380082995usmcf.pdf
    • http://com-signto2.xyz/193674280982qjup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_2aac2a8b553d43629a6c20701523e3d9.pdf?index=true
    • http://tewowes.rf.gd/68407692980.pdf
    • http://metiguwuwezaza.atwebpages.com/jepepawutujaxesalumegij.pdf
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_2200b93fdca949ad94e3a20b429223a2.pdf?index=true
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_923ac51c50044aecbb0bc72f9d23d062.pdf?index=true
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_2aac80d56627450bb7fe83b72b1740e3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07b.bin
3510b2da6f17e21037b80e05283fb719d445f4b606b4f187514e0228429dc367		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 4992 bytes
font_01_sfnt_off00010159.bin
c4ebf9374f183e0d06abff076368f9778f5420368af1f3cb29c6cd45b472c97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 1892 bytes
font_02_sfnt_off00010a79.bin
ad0632621ad1a15d7e766341795ef7a3316189e979682dbd809cfc3a012982dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A79 21712 bytes

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