Malicious PDF — malware analysis report

Static analysis result for SHA-256 364826843d209646…

MALICIOUS

PDF

69.9 KB Created: 2020-11-26 06:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 565c1026fcd9d3b601e90886ded79fcb SHA-1: ffbcd674667ef659da1df366cf36db966ca504df SHA-256: 364826843d209646cc3419046bfc6f7beae59c4f7e9291adbc03df5feaffe859
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The presence of a password protection lure heuristic also suggests the document is designed to trick users into downloading or interacting with further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffi.ru/strik?utm_term=a+herd+of+turtles+emerald+isle+nc PDF link annotation
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/wezigajit_rikugasilapojog_vokefalen_fiziwi.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/papelitosideve.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/gisuxukumu.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/wekakidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_5fbab79973d2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/legend_of_zelda_minish_cap_randomizer_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/vurokifoginuron.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/logudigumilefapofez.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/medicinal_chemistry_of_anticancer_drugs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/nabolaloloki.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/90894015053.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/wasapagetijetilebe.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/covalent_lewis_structures_worksheet_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 5248 bytes
SHA-256: 5fad5d866e5b44e4f9581c60ba846705bb8a036d4d90bc0d43da43eaff56f224
font_01_sfnt_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 11216 bytes
SHA-256: 683f503b32ab968815331405a10c5f252c03f7ef260aaefb4e6221558dec693f

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