Malicious PDF — malware analysis report

Static analysis result for SHA-256 9623cd7c13c7e371…

MALICIOUS

PDF

76.2 KB Created: 2021-06-03 23:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cc01499cdc2b297e846e69fb16ae0a3 SHA-1: dee345e6bfea014156197daa984031a91b162877 SHA-256: 9623cd7c13c7e3719d7ac886597e4350859d234c8c4bdf7a3474cbc98c546921
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. One prominent link, 'https://xajibur.ru/123?utm_term=android+reset+network+settings+not+working', suggests a lure related to Android network settings. The presence of a PDF link farm heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent, likely to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/123?utm_term=android+reset+network+settings+not+working
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/wukutabezuka.pdf
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/cf8cbe545e9.pdf
    • https://maxugiveworupuf.weebly.com/uploads/1/3/7/5/137513679/11e888b8.pdf
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/078ea5e8cbb.pdf
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/8247333.pdf
    • https://tuvepovuno.weebly.com/uploads/1/3/3/9/133997374/vekelozowutiladapuko.pdf
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/4104791.pdf
    • https://dajixogemozuv.weebly.com/uploads/1/3/1/4/131438707/bobabavo_xavirazosanilum_jisakerig_votetubonex.pdf
    • https://pitatulepuz.weebly.com/uploads/1/3/2/3/132303378/perodo-zumadovajadex-savomix.pdf
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/5835235.pdf
    • https://sidatotivokusud.weebly.com/uploads/1/3/5/9/135959985/gudetedasoreju.pdf
    • https://guxilidokuwog.weebly.com/uploads/1/3/0/7/130738661/dd8da0f87d60fa.pdf
    • https://xonalofogikovor.weebly.com/uploads/1/3/4/3/134372302/868aa1bcfef565.pdf
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/borokiwagute_soliditisa_fafidanoz_vezizotedu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/453a1d31-85ff-4620-bcdd-4aa8b8078b26/49619616439.pdf
    • https://uploads.strikinglycdn.com/files/0f0b1d14-fe76-4276-9fc4-e573fc59f86d/how_to_break_your_addiction_to_a_person_barnes_and_noble.pdf
    • http://nolumemonip.pbworks.com/f/62319451686.pdf
    • https://uploads.strikinglycdn.com/files/739c3fd9-3301-4949-a4d7-bb42fbca4e0a/social_studies_hieroglyphics.pdf
    • https://uploads.strikinglycdn.com/files/fc60a888-0eb2-4bc7-aee4-258a510fae5d/vetapijuvavaparawe.pdf
    • http://sorawako.pbworks.com/f/seratepowisogozazo.pdf
    • https://uploads.strikinglycdn.com/files/f5239c1e-09d4-412b-a40f-2d9309ae6ca3/how_to_find_mass_flow_rate_in_heat_exchanger.pdf
    • http://redelaw.pbworks.com/w/file/fetch/144554601/how_many_moles_are_in_17.0_grams_of_h2o2.pdf
    • https://uploads.strikinglycdn.com/files/f6614b43-60e5-49c6-97ed-60f5124ce7d8/download_fast_and_furious_5_sub_indo_360p.pdf
    • https://uploads.strikinglycdn.com/files/55dd4451-fd44-4da2-8620-43b3a872c856/20971712557.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed77.bin
7818de7b6dc5cf4d4263572fd87574cfa96cde9a83962c12e602501f8d682d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 4896 bytes
font_01_sfnt_off0000fe4b.bin
eb43f5939e6d20e8bffab2a03e0444ee52c8ac0437c84280c6755235989e6303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 10776 bytes

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