Malicious PDF — malware analysis report

Static analysis result for SHA-256 0115b5c939e34224…

MALICIOUS

PDF

81.7 KB Created: 2021-04-22 02:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c12888752c26ed225b4831b24487d06b SHA-1: 71600a41ee139b3ff60cc405070feb0f32bdab1e SHA-256: 0115b5c939e34224fc5753f0f1c5c744d817423ff91daa9d91c73077dfd20bba
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. While no scripts were explicitly extracted, the PDF structure and external links are consistent with a phishing or malware delivery attempt.

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 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://jumiwimov.ru/strik?utm_term=formato+de+dnc+pdf PDF link annotation
    • http://teksalle.xyz/how_to_get_marketplace_on_my_facebook_account7wyor.pdfIn PDF document text
    • http://tafuvomilo.22web.org/zimobaguzedibefofuvike.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/bangla_typing_in_computer.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/5593189.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/job_contract_agreement.pdfIn PDF document text
    • https://nivavige.weebly.com/uploads/1/3/0/7/130739715/tiraretipox-muxabem-majarobumexip.pdfIn PDF document text
    • http://megantv.site/does_firehouse_subs_offer_gluten_free_bread07ico.pdfIn PDF document text
    • http://peteferix.mypressonline.com/33507434928.pdfIn PDF document text
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/3915679.pdfIn PDF document text
    • http://bestita.space/flip_range_2_mod_apkudnwv.pdfIn PDF document text
    • http://instapriz.online/951544886089x517.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/20569621900.pdfIn PDF document text
    • https://zavutotarewif.weebly.com/uploads/1/3/1/3/131379951/numewosan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimumugemefes.epizy.com/fatorilibabuzisulew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6766de07-dcbb-4450-8f97-bb0b81c89250/20230847415.pdfIn PDF document text
    • http://nurojujejabilu.rf.gd/tefirarugozivitajaxaku.pdfIn PDF document text
    • http://digasima.rf.gd/21422833079.pdfIn PDF document text
    • http://dulibifusarumo.rf.gd/86980011814.pdfIn PDF document text
    • http://benamow.myartsonline.com/45048943217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60ca39a-c139-4f17-a354-6270c101a6a9/jologaris.pdfIn PDF document text
    • http://seposelub.rf.gd/couper_page_en_deux.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_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 5044 bytes
SHA-256: d19ad0a542b1c63c5293e9a5e1fbcc1ce0b70ccfbd9a6eb207d6125f4308c4df
font_01_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 10904 bytes
SHA-256: e277b36bb25e5b29287520c82d8fd80ed9752b2b92c8e67685e302585670cd16

Open this report in the interactive analyzer, or submit your own file for analysis.