Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f7f52fd878c17e…

MALICIOUS

PDF

72.9 KB Created: 2021-01-01 03:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 975a14a623a7bc15e61c00e3447be1cc SHA-1: ea1577bfd0379ad225268f27cc5c0e4c7b52097c SHA-256: 46f7f52fd878c17e35d341b84cc1798436b2d020ae935d5ba9786bae8ee2a5e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple Weebly and CDN URLs strongly suggest a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier output further confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

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 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://traffset.ru/123?utm_term=com.apple.mobilephone+error+1035+att+iphone+11 PDF link annotation
    • https://vetudibe.weebly.com/uploads/1/3/5/3/135320479/peguga-rokokiwuwixogo.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/xIghMig/tangled_up_in_you_tattoo.pdfIn PDF document text
    • https://vepiduworubul.weebly.com/uploads/1/3/4/7/134723348/zepivolu_suvame.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/ninike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_5fe624d1da792.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/7Ojcgew/bomezizovuj.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/MOtgfs8/join_clash_3d_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fa5ef22d72b2.pdfIn PDF document text
    • https://lelewamopubexab.weebly.com/uploads/1/3/4/3/134324934/7460834.pdfIn PDF document text
    • https://sawilemevopano.weebly.com/uploads/1/3/4/5/134577559/6869669.pdfIn PDF document text
    • https://zisowuwaxafo.weebly.com/uploads/1/3/4/7/134700917/6984928.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/idhbzjd/coffin_dance_game_roblox.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/serogajugomiji/computational_fluid_dynamics_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/descargar_formato_checklist_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/probation_extension_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/alopecia_androgentica_articulos.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_off0000dfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 5440 bytes
SHA-256: 449a89fe8ae05db53ae5016650ef492c69a488c596595d4b05a1482e50f9cdfc
font_01_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 10664 bytes
SHA-256: 766ced81baf16474a568775328487ca5f4ffc29d04b88e58dc136b64135e190c

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