Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de8e565e4d9ce0d…

MALICIOUS

PDF

80.2 KB Created: 2021-05-17 02:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3ecc7471f167eb29d24ff9005f16ba20 SHA-1: b53cfe0351924068f3237fc3fbef24c765431444 SHA-256: 1de8e565e4d9ce0d46228d8b505ae327a2fe57b70515f3740df43ed6e621d001
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://resalured.ru/strik?utm_term=how+much+does+all+my+sons+moving+pay PDF link annotation
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/3227007.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/rupilalodekiza.pdfIn PDF document text
    • https://temozune.weebly.com/uploads/1/3/0/7/130738928/b2ec7ca21b79.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/widimewariw-mukafoxokig.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/35b7f5b3.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/magux.pdfIn PDF document text
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/mavupaxebisizi-sewavufade-zeborudumoruxi.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/7585c0d.pdfIn PDF document text
    • https://nekawamanijem.weebly.com/uploads/1/3/4/8/134877182/998299e3c88a9.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/8cd29.pdfIn PDF document text
    • https://wanuzixa.weebly.com/uploads/1/3/1/4/131482886/wuzujokosoxefam.pdfIn PDF document text
    • http://kunanaze.iblogger.org/zolalazijanisosimidibowom.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/xumono-fixitedazibixot.pdfIn PDF document text
    • http://dimefovolij.iblogger.org/35773767010.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/xeposulavogus.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/5626624.pdfIn PDF document text
    • http://pesewopejezog.iblogger.org/michael_michalko_thinkertoys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagarereforer.epizy.com/complete_savings_refund_form.pdfIn PDF document text
    • http://piwapikefiraxi.rf.gd/sketchup_2015_tutorial_download_free.pdfIn PDF document text
    • http://xikebivulusures.rf.gd/free_menu_template_for_microsoft_word.pdfIn PDF document text
    • http://zisajevejeniw.epizy.com/business_letter_sample_free_download.pdfIn PDF document text
    • http://gozebodene.rf.gd/41201142780.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_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 5608 bytes
SHA-256: 0c49dffdcf247d49260ad3128fd8e66b70606d2439f22d556cd7b8809bc0d81e
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 10820 bytes
SHA-256: 71a9aaf0364605a0121c7a29a068511a805917937de1e35cb62d065f82a73861