Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32a7699bb57dbaa…

MALICIOUS

PDF

80.1 KB Created: 2021-04-07 20:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f016e46a4c34344d31ec1c4af7febbe6 SHA-1: 8a0743e43d8126749a5ac1b1dfd926705bc14094 SHA-256: a32a7699bb57dbaa3e5e541026ef30d7bc759bce5a28a4ab4bf9ed48bbf8bdda
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=manga+pose+book+pdf PDF link annotation
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/fotukovavagas.pdfIn PDF document text
    • http://kiladuwujufuzav.22web.org/la_peste_de_albert_camus_gratis.pdfIn PDF document text
    • http://bloodcraft.online/black_desert_deutschr0zn4.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/velafemuwiranemijit.pdfIn PDF document text
    • http://on-arenas.com/como_descargar_minecraft_sp_1.5.26r528.pdfIn PDF document text
    • http://jemaxawiju.22web.org/20835898023.pdfIn PDF document text
    • http://prosale.company/529653623980tphg.pdfIn PDF document text
    • https://velawavasikene.weebly.com/uploads/1/3/5/4/135400921/2150162.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/best_synonyms_and_antonyms.pdfIn PDF document text
    • http://testvvd.xyz/614163327695e1ia.pdfIn PDF document text
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/6dfc4e52735.pdfIn PDF document text
    • http://antileqphh.site/raledudopevevuroreusjvh.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/radiative_heat_transfer_solution_manual.pdfIn PDF document text
    • http://getfreecreditreport.info/sears_roebuck_sewing_machine_cabinetvigf1.pdfIn PDF document text
    • https://rozinefowo.weebly.com/uploads/1/3/4/5/134576391/gumulumeni.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/b9632ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifumupesa.rf.gd/l_t_credit_risk_fund_factsheet.pdfIn PDF document text
    • http://silapopo.epizy.com/40773588424.pdfIn PDF document text
    • http://xixizojefojedo.rf.gd/biodata_creator.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 3188 bytes
SHA-256: 09c1c05a6bb7a9d598c20b291b58e95f7449055a487dd13c3878ff15832a2dcb
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 5292 bytes
SHA-256: 42958a8e3cbce64a8faa457223c530c132ede01adefcd392b07c0e111bc3fc79
font_02_sfnt_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 11616 bytes
SHA-256: 2e1a2d1eef1f8975698ddacfaa3b0f36b8fd2e571cb82deb447caa80f351dc56
font_03_sfnt_off00011c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 16068 bytes
SHA-256: 12bdfdd26b42687ed6d6e4673084773943fc64d80ea302008a05158b1f99f3df

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