Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f336f5e8f8f47d8…

MALICIOUS

PDF

148.8 KB Created: 2021-04-08 05:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94022fff7a68a5953a66eed3eb585fae SHA-1: eb482a9b87db0bfa413b23f790b7d933753c36d9 SHA-256: 0f336f5e8f8f47d8bac9cf141cffb1adbbaf3c2f033d25a2661345d10db89b73
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a specific detection for advance-fee scams. The document body, though heavily obfuscated, contains references to 'Cambridge national lending reviews' and appears to be generated by wkhtmltopdf, a tool often used to create documents from web content. The presence of an external URI pointing to 'pelibifir.ru' suggests a potential command and control or redirection mechanism, commonly used in phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/wix?keyword=cambridge+national+lending+reviews
    • https://cdn-cms.f-static.net/uploads/4367621/normal_60608cb18d83a.pdf
    • http://teasmall.space/519563670908j1v0.pdf
    • http://zarabatyivat.ru/6383089587534trh.pdf
    • https://cdn-cms.f-static.net/uploads/4475582/normal_5fe72f4cab8ff.pdf
    • http://sell-toclick.online/683649438424ems7.pdf
    • http://malespw.xyz/sodejafebah4s4b.pdf
    • http://wersita.fun/meteruwewosa4ueo3.pdf
    • http://remont-kholodilnikov.website/smart_you_tube_tv_baixari170a.pdf
    • https://vemanilulo.weebly.com/uploads/1/3/4/3/134378365/zoxapog.pdf
    • http://form-lnstagramverificationbadge.com/spoken_english_grammar_in_kannadaf7ha6.pdf
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/864916.pdf
    • https://cdn-cms.f-static.net/uploads/4470211/normal_6063473ce03ef.pdf
    • https://bepifesak.weebly.com/uploads/1/3/4/0/134096259/3265949.pdf
    • https://cdn-cms.f-static.net/uploads/4448535/normal_601995c2d4b9d.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_71c2eed203c640cf88b2f8b085be24bc.pdf?index=true
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_e4e93e819b234a589114e54270bddc36.pdf?index=true
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_b4947c760bf94b9d97f6d445eb5f028f.pdf?index=true
    • https://s3.amazonaws.com/zaxawetawupo/reluctant_fundamentalist_full_movie_download.pdf
    • https://s3.amazonaws.com/vaxebisapesi/angkor_fighters_movie_in_tamil.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e32c.bin
d2df3ce7c96835aa6031d7d5d0f14065578f43fbc7438c66e2954480d326534d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E32C 2644 bytes
font_01_sfnt_off0001ee85.bin
1b93cc13b58f3ec5ff1430e5a13f6987b5e6a3671b3ab50b0d0737c1e20af15d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE85 5340 bytes
font_02_sfnt_off000200a2.bin
cbf15e2e0ce059f32574289c4ffd12e67a5ac650060a98116c1a64c6d4c901c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x200A2 13736 bytes
font_03_sfnt_off00022f19.bin
fd3f21e49997728d7bf1d1cbedb743d37f010e8944e4a374233e334cf0696079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22F19 16216 bytes

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