Malicious PDF — malware analysis report

Static analysis result for SHA-256 1881aa46ae30ae64…

MALICIOUS

PDF

74.4 KB Created: 2021-03-24 01:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca81a2557da5cb7d2b975b87e013c9e8 SHA-1: 2fbd4849bef2c80ed81772906b84128c82ad8991 SHA-256: 1881aa46ae30ae64bec0975790b400b521c841a9ee6030cd4ef1b3faeb83c5d8
186 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://bologen.ru/123?utm_term=police+report+lookup+missouri
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/4034048.pdf
    • https://nirereki.weebly.com/uploads/1/3/1/4/131483126/c65b3.pdf
    • https://jidupedepinamup.weebly.com/uploads/1/3/2/6/132680921/d30b849cd7.pdf
    • http://eroganoficial.site/high_achievers_b1_answersn2f5h.pdf
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/9c2d764.pdf
    • http://lasns.fun/tabapigopodadititinelonelxqm.pdf
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/f2d780b4f88.pdf
    • http://rubisteq.online/toshiba_satellite_l750_drivers_windows_7_32_bitrcrzv.pdf
    • http://tpdreport.com/13141222092ognqs.pdf
    • https://rusizugijenu.weebly.com/uploads/1/3/4/3/134340450/piradafu.pdf
    • http://ewop.space/catecismo_maior_de_westminster_comentadore3w6.pdf
    • http://rusewigojubilon.mygamesonline.org/rotamib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_a7a1e80bb25a468dae85f5fd532e2bb6.pdf?index=true
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_da65863b637541209a7e7e4fe45a9cea.pdf?index=true
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_bf043065ced74f7b9af89e4547553cd6.pdf?index=true
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_9671dc88e3b84340a7e1ffa6254fa699.pdf?index=true
    • http://luxupuxud.myartsonline.com/fokezavotemokaxapulim.pdf
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_3d9fe2c44bf849bbaed9f3ad99abb804.pdf?index=true
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_fabee24072bd47fabec0d1f8d788b0c7.pdf?index=true
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_d10dd0d4aaf944be95df4f0db7732428.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e650.bin
e20260b80a343613d286fe2a43037de502ea5c3b20e329327bd26e6f1fb1c118		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 4932 bytes
font_01_sfnt_off0000f707.bin
521893123184fe21ac1960b1bc27917f1bcfd4a2152fd9e786108cf1363fc1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 11176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.