Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdcfbb60e133165…

MALICIOUS

PDF

83.7 KB Created: 2021-03-13 17:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfdc2709f19305977c148566c52bf37c SHA-1: d7d765211ce5a73f0b73105ac9c5489477cf9ea7 SHA-256: 8bdcfbb60e133165db715c169778d97c92d1d161cf81db68f7647a158a1bf358
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to unknown or potentially malicious domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=exit+west+pdf+ita
    • http://tisimewifexumi.iblogger.org/12311687399.pdf
    • http://vorovebofoluz.22web.org/bezatuvuk.pdf
    • https://cdn.sqhk.co/gederanew/imGyoP7/steelseries_aerox_3_amazon.pdf
    • http://13millions.store/5461684473516bzj.pdf
    • https://cdn.sqhk.co/tibatojo/iBgehjp/lexatanojeguginile.pdf
    • https://cdn.sqhk.co/binisomomup/buCiiFH/71685185567.pdf
    • http://ig-copyrightviolation.com/texas_comptroller_annual_reports3y9i.pdf
    • https://cdn.sqhk.co/rowemarul/oNTbgd1/cyberfoot_soccer_manager_2020_mod_apk.pdf
    • https://cdn.sqhk.co/wowixepis/hbhjuJy/zifade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_61e952681772470ab446a6786f7bc4ae.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c99b8da3-cfca-4f90-a38b-c7226a709912/55039596939.pdf
    • http://lumapuxasut.epizy.com/handicap_parking_permit_florida_form.pdf
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_9a099ec2be364882ba3527d2a0ae98f9.pdf?index=true
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_d2270ff43891472fa515933009e0afc7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c0922659-d300-4e7f-bad4-0ecf1e3238d6/62638315385.pdf
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_888bcf99737f4779bc2362b7fb231716.pdf?index=true
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_c412247248e24fa6a8385dcc1180d798.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9723b0a-b52c-4c1b-a0bf-07afb7a704e9/3285542325.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd62.bin
0970cb0cb5f74f476d5527ef3f0d344bc484127cfbbeaa8ff0abbb0bb4273612		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 4596 bytes
font_01_sfnt_off00010d27.bin
dc62a19a4540f7211e7164723ae2e5f4e37e76ccdb09640eb087c05f0e279053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 11808 bytes
font_02_sfnt_off0001342d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1342D 4324 bytes

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