Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fb9d3f2af8a40d…

MALICIOUS

PDF

84.0 KB Created: 2021-03-19 16:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 77403e3888cec7d90f9188bd1872b1ff SHA-1: 26370e61bd7d6c617bd34da49984bfc3efb90a49 SHA-256: 95fb9d3f2af8a40d2a1b0dfceb5186c1eee5a5f6ccf39efe47cff402dd169504
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with at least one, 'https://dugedepap.ru/strik?utm_term=how+to+use+vif+in+python', identified as a potential phishing or malware distribution point. The PDF structure and the presence of external URIs suggest an attempt to redirect the user to malicious content, likely as part of a phishing campaign or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=how+to+use+vif+in+python PDF link annotation
    • https://cdn.sqhk.co/kojetovukufo/hgyjihi/33628065046.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/17559661813.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/gVCigIU/fumukezirovumetipesirarof.pdfIn PDF document text
    • http://xugilerasifoveg.22web.org/72932483135.pdfIn PDF document text
    • http://rofuzixaveminup.iblogger.org/gosiwojisetojotibemulo.pdfIn PDF document text
    • http://depusapo.mypressonline.com/tosaruxobigibodujigiberuk.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/dD8QRem/sepudikewiremagudijozetuk.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/is_keto_cycle_worth_it.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/estadisticas_de_alcoholismo_en_mexico.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/f4iimjg/super_smash_bros_crash_nds_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/the_adventures_of_tom_sawyer_by_mark_twain_download.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_def8c5f10fbf4bcf975a5530ca646f12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/hornady_300_blackout_load_data.pdfIn PDF document text
    • http://voxuluvaj.epizy.com/24082670692.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/94959644763.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/zuxugatiporegaf.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_1e7404064da049ac9e6468f2866c99c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/vampire_diaries_season_7_episode_16.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/acute_ischemic_stroke_definition.pdfIn PDF document text
    • http://nobapizasiwe.myartsonline.com/busalumegiv.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/wigomuwonawikona.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_much_does_pacsun_pay_managers.pdfIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_c167e16589144625bfabe0061b567b2a.pdf?index=trueIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/placental_bed_disorders.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_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 4864 bytes
SHA-256: 38bfae6817aef3ca8e512201142b7f31972b73b0cfacdda97c9aa30a8ae95fd3
font_01_sfnt_off00011e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E51 10620 bytes
SHA-256: d0da46e6df7b6dd328eef2b8ea5b75c30e864c79998b654dea50401d82a574a2

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