Malicious PDF — malware analysis report

Static analysis result for SHA-256 7480bc3040001047…

MALICIOUS

PDF

87.3 KB Created: 2021-04-03 04:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e1d3b089449024654c191f78f7a53b00 SHA-1: d2e6870a452e044f6a8b4c246ba47309bb86dc21 SHA-256: 7480bc3040001047646592981fdd10f354f79a2cd5e15973afcd462b6f0c5c2d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing lure, indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The primary URL, 'https://pelibifir.ru/wix?keyword=watch+wolf+of+wall+street+online+dailymotion', is presented as a call-to-action, likely leading to a malicious site. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=watch+wolf+of+wall+street+online+dailymotion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5fdc174289f01.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/1047803.pdfIn PDF document text
    • https://tefegori.weebly.com/uploads/1/3/1/6/131637168/luxizasu_vevokogatetumew_wodoxukisewukod_binunubavazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393361/normal_60030f0339af5.pdfIn PDF document text
    • https://mizunilido.weebly.com/uploads/1/3/4/3/134352057/aac66d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_601dd63c9c625.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/zetubakuz/59709363000.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/chuyn_sang_hnh_nh_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/safety_data_sheet_for_gasoline.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/what_is_the_application_process_for_ucla.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/guide_des_oiseaux_de_france.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/92021639951.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/software_architecture_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/aqw_le_bot_8._9_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/taranodurezopepug.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/inequalities_word_problems_with_solutions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/16605626980.pdfIn PDF document text
    • http://kizarepopudoso.epizy.com/copy_sheet_trong_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/dutikixoriwup.pdfIn PDF document text
    • http://susudovafe.epizy.com/xevibifiweza.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_off0001164d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164D 5468 bytes
SHA-256: 7bf5d11eebbd676280310f4490a1c9cc321649b2bab7be37daa5d06f30c5afee
font_01_sfnt_off000128db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DB 11672 bytes
SHA-256: 0c0aaeb84d1fd6dd30c8329b66ca1281aef8baaef6e590e36953ece7c69b7950