Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc88d355fe404f3…

MALICIOUS

PDF

75.7 KB Created: 2021-03-01 18:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d69bee7c4fbaae8f692542eb046698dd SHA-1: b8265a6831da8723b9efae8d22e6f53871be918e SHA-256: bbc88d355fe404f3e147b6dfb8aa4f349bf949910b8af78fa4ad0334df42c7ae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on a link to 'fokemale.ru' which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, appears to be a lure related to a 'Jack lalanne power juicer cleaning' guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=jack+lalanne+power+juicer+prestige+cleaning PDF link annotation
    • http://gizapiretade.iblogger.org/60570107439.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/jofoden.pdfIn PDF document text
    • http://jebumivusesujan.iblogger.org/bootstrap_themes_free_with_slider.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_60188584efd12.pdfIn PDF document text
    • http://defumemijiwof.22web.org/modello_ritenuta_d_acconto.pdfIn PDF document text
    • http://vizerabo.iblogger.org/super_mario_3d_land_walkthrough_world_3.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://ginowane.onlinewebshop.net/viwuwojorikeropanag.pdfIn PDF document text
    • http://gajovab.epizy.com/nekuwoziruleloxibakufurok.pdfIn PDF document text
    • http://magivaxinel.rf.gd/goods_inward_inspection_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/neonatal_hyperbilirubinemia_treatment_guidelines.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/67297083157.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/vusuwukozawumarak.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/plc_programming_course_free.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_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5204 bytes
SHA-256: b72f41e7b4ed20bcd92be624fb400ecf3bc6f8a54c71530272fc4fbb32950edc
font_01_sfnt_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 10984 bytes
SHA-256: cbf00f564d195b9e8f8c73caffe4e2f46b64379fca0b87a63c385d18a335880e
font_02_sfnt_off00011351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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