Malicious PDF — malware analysis report

Static analysis result for SHA-256 e397022384b5b6bc…

MALICIOUS

PDF

75.1 KB Created: 2021-04-10 08:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54cf947bd375c73aea52da21ab04e5ff SHA-1: 94757d1c32bdaba5e380f7bb47617020626fca6b SHA-256: e397022384b5b6bc630cbed1ca5732d16cd7d1b908362c41f5131cf2b23dfd1b
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=wyckoff+method+of+tape+reading+pdf PDF link annotation
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/5592571.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/bhaktapur_map.pdfIn PDF document text
    • https://fikelepokaretes.weebly.com/uploads/1/3/1/3/131397971/2884340.pdfIn PDF document text
    • https://nobozemesatib.weebly.com/uploads/1/3/0/8/130874372/29332.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/mudexatonutipi.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/6238aa41b.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/52069569815.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/JjdhcUx/classic_car_driving_racing_simulator_mod_apk.pdfIn PDF document text
    • http://gawolesimavuvad.22web.org/autocad_batch_plot_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/J2MhjMo/warren_buffett_house_security.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/powuzopeg-susefet-ganavob.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/belurorigimit-jebolo-pelebukovelos.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/1963237.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/vekupanaguliratup.pdfIn PDF document text
    • http://zupubovogigu.iblogger.org/list_of_star_trek_voyager_episodes_with_borg.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/1ebaeaccca66d.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/igheibO/54759372363.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/free_house_rental_agreement.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nemunuj.rf.gd/best_android_games_review_site.pdfIn PDF document text
    • http://mubapumasas.epizy.com/vemelotuf.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_a954926d6d0c4d719bdd07a30fcc3bb7.pdf?index=trueIn PDF document text
    • http://fapizof.rf.gd/naxopetugujubezosoxiti.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_21e6fb140460460d99b355fce39da8c9.pdf?index=trueIn 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_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 5536 bytes
SHA-256: cb0be16cb2be7a0e1cec0ccf376a8fcfd800c89ebbd053005552570730e20903
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 10596 bytes
SHA-256: e02665d3782c02dd2f99d36529201edbc397e25f6b3511a11069504e50e815e3