Malicious PDF — malware analysis report

Static analysis result for SHA-256 92589091579b74d5…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 17:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3dec4d91ec8cf9d94832ffe5669ce40c SHA-1: 816d4a374f0cdaba9d25e35aa3e2bc2e2cba27c7 SHA-256: 92589091579b74d57e3231377f9b354018e2e6f284037e785cc5becd8bb29d37
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with 'fokemale.ru' being a primary example. While no scripts were explicitly extracted, the PDF structure and the presence of external links point towards a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://fokemale.ru/strik?utm_term=how+to+filter+deep+fryer+oil PDF link annotation
    • https://pewewikivu.weebly.com/uploads/1/3/5/3/135302390/zesit.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/9663590.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/B1hggg8/mineral_oil_for_constipation_during_pregnancy.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/6zkjigi/thrifty_car_rental_denver_shuttle.pdfIn PDF document text
    • http://xojuxegalixiluj.66ghz.com/hold_on_chord_overstreet_musicpleer.pdfIn PDF document text
    • https://cdn.sqhk.co/tudenireso/h9EihKz/refadofiwaferolajunoxolo.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/gj7GiiU/vovipukobufipe.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/gjii0gj/40541916361.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/cSw8ida/mindshift_technologies_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/shbhdgc/49816476216.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/fOjjj7h/ocean_s_fortune_portia.pdfIn PDF document text
    • https://zuvitapud.weebly.com/uploads/1/3/1/4/131406427/fopebosuza-jivalonagapol.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/baposivarabuj/love_yourself_answer_l.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/jimelubalafep.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_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 4800 bytes
SHA-256: 5eeed1d78516a2c911a1724e15031ad943b5d7d8e0d799781eb6017f96198dc5
font_01_sfnt_off0000fac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC6 10732 bytes
SHA-256: d67e40b71bdafdfeab0fde0ba0660fc5eb8a4e3d9980de47afd03a010c1ef0f0

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