Malicious PDF — malware analysis report

Static analysis result for SHA-256 324fe43fba8e9bdd…

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 16:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f90be7a8b93140b530e25e6770d2b1e SHA-1: c3fecc57aa659cf04061e674a84494e079d92484 SHA-256: 324fe43fba8e9bddfe4267493f1496f32f43887ac467b7215a8b19f71a8e584e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to phishing sites. The presence of numerous links suggests an attempt to distribute malicious content or traffic. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mezovuduw.ru/123?utm_term=aankhen+movie+govinda+songs
    • https://gikemuzeta.weebly.com/uploads/1/3/4/4/134442652/854242.pdf
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/bizis.pdf
    • https://cdn-cms.f-static.net/uploads/4404113/normal_6050dbb6e04e5.pdf
    • https://cdn-cms.f-static.net/uploads/4477913/normal_6022622889a8a.pdf
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5fdc3cc70484b.pdf
    • https://wiliwakura.weebly.com/uploads/1/3/4/5/134596421/zunesikexikulama.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mibegenav.pbworks.com/w/file/fetch/144667560/puxodonovamasosegeremu.pdf
    • https://uploads.strikinglycdn.com/files/56f0bb10-98eb-4df5-b661-7ac4dbab1a2d/what_purpose_does_the_setting_serve_in_hills_like_white_elephants.pdf
    • http://xawaren.pbworks.com/f/how_to_improve_skin_texture_under_eyes.pdf
    • http://wefolevemud.pbworks.com/w/file/fetch/144441507/kymco_dink_200i_price_philippines.pdf
    • http://zivovot.pbworks.com/w/file/fetch/144644154/86884419640.pdf
    • http://xugatun.pbworks.com/f/4th_grade_grammar_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/c7c62ce3-4cdb-44a9-8630-449b19db0147/fafadoxu.pdf
    • http://pezeliv.pbworks.com/f/69771765124.pdf
    • https://uploads.strikinglycdn.com/files/c644fe5d-452b-4b8b-a130-35517e1cd5c7/how_to_turn_volume_down_on_adt_panel.pdf
    • http://vosebim.pbworks.com/w/file/fetch/144599568/xesevenaz.pdf
    • https://uploads.strikinglycdn.com/files/6a4ef9bf-5f34-4ac7-9c44-2139efdf9cf6/aprilaire_thermostat_schedule_blinking.pdf
    • https://uploads.strikinglycdn.com/files/3ed67621-eb77-4d26-a839-0e231fcefc54/15134510652.pdf
    • http://fagimox.pbworks.com/w/file/fetch/144752547/dojurokonegibid.pdf
    • https://uploads.strikinglycdn.com/files/de8f25ba-99d4-44b0-abb9-79a343efdcb4/vejevovorulob.pdf
    • http://zudilazo.pbworks.com/f/65041184280.pdf
    • https://uploads.strikinglycdn.com/files/38dfd519-88cc-44e8-901c-39ab91c49275/pedesexa.pdf
    • https://uploads.strikinglycdn.com/files/d54968d2-b4ca-4101-a941-ca11f1c0e4f6/nemoxun.pdf
    • http://jubujefaj.pbworks.com/f/escape_the_ayuwoki_apk_pc.pdf
    • https://uploads.strikinglycdn.com/files/22bb65c8-8201-4df1-a40e-4d8ff63f402e/tijulimilaxo.pdf
    • https://uploads.strikinglycdn.com/files/61ca1fe9-6589-4c91-877f-75c9050a1594/26741892940.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_off0000f261.bin
e79ec31d3f10d55af9ade763e2f5b6005b2611132387b0f19e74927ac4979d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 5224 bytes
font_01_sfnt_off0001040c.bin
99a0c0a6b054a21e5ff10b4f1910161d38b42386178e8e599d8215a8997556e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 11484 bytes

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