Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d50e6734e543d6…

MALICIOUS

PDF

80.8 KB Created: 2021-04-24 02:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ae6d041facc87dcb7dc1b30bd20f7507 SHA-1: 1e0a1d726f7d52393e6512045477334e243e73e1 SHA-256: 03d50e6734e543d64c95dd64a64434e0d48e5fc7acab69c4381a3d556d138720
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body is heavily obfuscated and appears to be a lure related to a book title, likely to trick users into visiting the linked sites.

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://botokaw.ru/strik?utm_term=what+i+learned+losing+a+million+dollars+epub PDF link annotation
    • http://ladiluvame.mypressonline.com/mefubexufax.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/jX7AagQ/83835328339.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/bafoxojodokozenalefafesuw.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/1687737.pdfIn PDF document text
    • http://fesalasan.mygamesonline.org/sapemovunomozapizewigibe.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/lewaj_sileripuxobadi_jisuwinage.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hghfF4O/drag_burnout_car_for_sale.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/best_speech_on_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/fc9jgaf/79466341299.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/burano_map.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/hbwZhdr/navy_corpsman_field_manual.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_often_should_you_regenerate_water_softener.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://jokubamobivavum.onlinewebshop.net/budiwuvaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/garmin_660_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/30875472799.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/management_accounts_template_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/37423837175.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/79083662752.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_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 5408 bytes
SHA-256: 3668782ab1ff23f76b2272ac0a0f82678f30d0f746f76456f018622a543d91aa
font_01_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 21056 bytes
SHA-256: f5b4068a2eb853a715aa4af3a039508f4dd8a779de5b4283b0d62f007a80e4fb
font_02_sfnt_off00012642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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