Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6dba8be2c8e8e5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-29 00:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 904d29b0a59eb17c8cc78f7c1479f5e5 SHA-1: 77c7f4c744f55ef7ac43da9780bad250f0ed0766 SHA-256: af6dba8be2c8e8e57dd0065ea1b9c390c2fedadbcff0cfc4619729fb5c4c3cd2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term=goat+simulator+2+player+games' in one URL indicates a potential lure, possibly related to fake game offers or downloads.

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://maypoin.ru/strik?utm_term=goat+simulator+2+player+games PDF link annotation
    • http://ejqy.com/31438284922vav8j.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/affidavit_of_ownership_birth_certificate.pdfIn PDF document text
    • http://senteber.site/olympus_om-d_e-m10_mark_iii_manualchjyp.pdfIn PDF document text
    • http://bemigovoso.iblogger.org/rawezovujemuzejebupevu.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/what_does_a_shepherd_do_for_his_sheep.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/chickens_for_sale_mnulwtx.pdfIn PDF document text
    • http://kigurumi.org/34189503144z308c.pdfIn PDF document text
    • http://3gusevshop.website/9872217358539lhd.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/are_disney_world_fireworks_cancelled.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/totifubagojoxotonozanux.pdfIn PDF document text
    • http://megatorg.ru/pididowinakuxil2aeo1.pdfIn PDF document text
    • http://axacheat4.xyz/ford_mustang_2021_price_south_africaaed9i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fologipuvug.epizy.com/97849886970.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_b949ab0500f7488faddbc016454bca91.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_de18facf8fac453899b6ad93297ccc61.pdf?index=trueIn PDF document text
    • http://bovuzigaratufob.rf.gd/rezarofebewekofuwoz.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_533a30a3bd734e5dbb4719e9786da50e.pdf?index=trueIn PDF document text
    • http://muduwabu.rf.gd/sapawipanorur.pdfIn PDF document text
    • http://roripufunubome.rf.gd/boss_fs-6_footswitch_uses.pdfIn PDF document text
    • http://siroluga.epizy.com/abordagens_da_administrao.pdfIn PDF document text
    • http://futebupolidasuk.epizy.com/jajewado.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 5180 bytes
SHA-256: cc609ae7f95bb3e3a000c66d3665f5a04f59be79fbc80195b81d44d8353925d5
font_01_sfnt_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 11052 bytes
SHA-256: 6e0ef08e12722c5106f4f5d3d03b792d1f82cbcc3c2ba17d7c27ee88c52835b5
font_02_sfnt_off00011a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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