Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78621a6d52684a1…

MALICIOUS

PDF

80.4 KB Created: 2021-03-27 22:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 26cd8dc4de43b66c474665bde41ccf63 SHA-1: 2d25f1a1ddda51d40db817ef4a05f69bc2108e47 SHA-256: b78621a6d52684a186c3ddc37ed07ddcf8a894b1063d74bd335d640dffc859dc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru/strik' which is flagged as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=matched+ally+condie+full+movie PDF link annotation
    • http://vetapako.22web.org/rumagovulelezolagaxeduzug.pdfIn PDF document text
    • http://safagiko.iblogger.org/76042336405.pdfIn PDF document text
    • http://cheapestshop.xyz/lauren_lapkus_looks_like_dj_quallsscjx2.pdfIn PDF document text
    • http://mugowewu.22web.org/xafokib.pdfIn PDF document text
    • http://forpost-electrica.ru/songtext_the_power_of_love_celine_dionm30zk.pdfIn PDF document text
    • http://drilltech.info/98082008503rfmhy.pdfIn PDF document text
    • http://xplaintome.ru/sihc_hat_trickswc0az.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zikoliduxa.atwebpages.com/patej.pdfIn PDF document text
    • http://mamepekavileput.rf.gd/regapitiwimogakolebaro.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_f93aba4a9e0a4b41905141691e48feda.pdf?index=trueIn PDF document text
    • http://fonofexigakivi.epizy.com/lifetikuxibiva.pdfIn PDF document text
    • http://niwepikos.rf.gd/lifetime_54_portable_basketball_hoop_assembly.pdfIn PDF document text
    • http://vesuduw.epizy.com/18521369432.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_41aae4377c3348d6855da6b18b2d831f.pdf?index=trueIn PDF document text
    • http://dowovefedomo.epizy.com/tudijaguganutur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bf5cc7-1d30-4787-b90f-dacee35ed92d/stephen_king_11_22_63_book_review.pdfIn PDF document text
    • http://refitebi.epizy.com/galeboxefagufedapet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcf8e24-5706-4495-96be-4ed200ae360a/how_do_you_calculate_net_present_value_of_cash_flows.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/jujozo.pdfIn PDF document text
    • http://ruxabuzavejar.epizy.com/pokemon_emerald_guide_apk.pdfIn PDF document text
    • http://nujebij.onlinewebshop.net/54872084814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b77729-6bea-42d2-b5d0-ca7466d45a2b/kogowitesuzapujodaxuseket.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/tedipusavudemoforukovu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5036 bytes
SHA-256: c3f380a904642b3663691c204d8f9b3ac3465fd8e1350611062cf59557988605
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 10676 bytes
SHA-256: 8ea836428dd38347af37f63ac741c65f4852f6f2d5b2a4296feb43f256c8ed6b
font_02_sfnt_off00012449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12449 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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