Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d6e0d00c137db6…

MALICIOUS

PDF

79.9 KB Created: 2021-03-22 21:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ad9f697b88f47668ef44ece2b22f15 SHA-1: c2874dcb640ca20fe2caac5a2a9ffac1c34dc612 SHA-256: c9d6e0d00c137db62ff91a905bc17c6239a49d3b1ade874e8177219fdfcac69a
204 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a large number of external links, many of which are SEO-optimized PDFs, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'gta 5 hacking tool', likely a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wix?keyword=gta+5+hacking+tool
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/wusagakesalet.pdf
    • http://gufufisazikoja.iblogger.org/81417707173.pdf
    • https://nafepamozox.weebly.com/uploads/1/3/1/0/131070284/zutufo.pdf
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6012962142f06.pdf
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/53ec7fc29201631.pdf
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/xanobov_fetubelalugas_xuravesixozefum.pdf
    • http://pokanupat.iblogger.org/brewmaster_monk_guide_8._1.pdf
    • https://metidelesaweso.weebly.com/uploads/1/3/0/8/130813592/zipefe.pdf
    • https://janodapos.weebly.com/uploads/1/3/1/6/131636969/tavinof.pdf
    • https://cdn-cms.f-static.net/uploads/4492588/normal_5fe8ad6b8a6eb.pdf
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/4126857.pdf
    • https://tirokaroxere.weebly.com/uploads/1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_bcdffa7e145a47b9bb776bac4d7e117d.pdf?index=true
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_e2bf408d82854b26bdb69528741c7087.pdf?index=true
    • http://vonezilomobupir.rf.gd/how_to_tie_a_present_with_curling_ribbon.pdf
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_b1f5325829244358a80bb6050848ae43.pdf?index=true
    • http://todezisalofabit.rf.gd/bapawexokabekikebov.pdf
    • http://koxogulu.rf.gd/periodic_table_of_chemical_elements_impact_on_human_welfare.pdf
    • http://mesovinofezesat.epizy.com/pegatron_motherboard_2ad5.pdf
    • http://tiwokuvaredix.epizy.com/the_will_to_change_bell_hooks_read_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d4.bin
7588e8294437a76ae97dd5ed229e03a064e783317e4d32fb6efa9b64ece09d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 5004 bytes
font_01_sfnt_off0000f8e4.bin
8079b5b5e2b43c8450106f6c2190323dd06d09726f90005452040a5f0c924089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10440 bytes
font_02_sfnt_off00011ce3.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 16204 bytes

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