Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac647f79cf5f3fd…

MALICIOUS

PDF

78.5 KB Created: 2021-05-08 02:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfeb505fe34447b90ccfbf55a6e29f0b SHA-1: 14012e692fefe34f8531235bb2fba226405a77f8 SHA-256: 0ac647f79cf5f3fdc7228dc7d732ff4b3d4a9c07dc1fd1f136d2003522aae1ab
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The presence of an external URI pointing to 'seumenha.ru' strongly suggests an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware delivery attempt, likely initiated via spearphishing.

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://seumenha.ru/strik?utm_term=the+neverending+story+dragon+flying
    • http://slimerecipe.org/races_of_eberron_dd_3.5j553g.pdf
    • http://snapchat-alert.com/the_power_of_prayer_sermon1wcec.pdf
    • http://italysummer.space/warhammer_40k_cover_rules_9th_editiongr6ht.pdf
    • http://xikedaj.iblogger.org/90343304262.pdf
    • http://figedizizexi.22web.org/dank_meme_templates_2018.pdf
    • https://kutepuwabaluv.weebly.com/uploads/1/3/2/6/132681670/wikaroxexun_pitubiwojo.pdf
    • http://lnstagramverifiedbadge-form.com/vodipufutixelimexisexafebalsa.pdf
    • https://tuzupenaxu.weebly.com/uploads/1/3/1/4/131454165/9772318.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://siwavubixuvavil.rf.gd/all_world_tv_channels_apk.pdf
    • http://fegozovot.rf.gd/attestation_de_formation_uber_montreal.pdf
    • http://jatuvudusu.epizy.com/anemia_de_clulas_falciformes_pediatria.pdf
    • https://e2685184-9bcc-4d63-b126-5f7cf6655de3.filesusr.com/ugd/267f13_67afcbcbb2e54a7a8a5c2d9eeb1f8579.pdf?index=true
    • http://nevegeb.rf.gd/eyelash_extension_aftercare_cards.pdf
    • http://mawesawikatunus.epizy.com/gusuretez.pdf
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_b29c0fe60f704e578ce7afdeed0bbfdd.pdf?index=true
    • http://wewuletojenana.epizy.com/bound_by_flame_demon_transformation.pdf
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_e6221a3d4d1b4c3a8f2cbf33d919997f.pdf?index=true
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_1b8be647e166449a98f2adf2d3ca5776.pdf?index=true
    • http://jijeledinevo.rf.gd/46702831380.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_off0000f1aa.bin
512cd6b6042edbcd6473c573a31c7f703d21684c3e536b2cb9b733a9bdbc79ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 5280 bytes
font_01_sfnt_off000103aa.bin
1f2fc4e8a38e5e212cc19386bd21e410825a9cc2551e6fdbddb7e72fbd487d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 11684 bytes

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