Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a436afa5a7e3403…

MALICIOUS

PDF

92.4 KB Created: 2021-06-26 07:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e5e6ba80299d2e5e03f69a0948d0f4a4 SHA-1: c9c67abc010152ad09354775754bda5df61b9ae9 SHA-256: 7a436afa5a7e340302881e2202e262e6d8c23cc7ad33a604aceba44c3b0bdd2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://albatrossmrn.com/konadnew/userfiles/file/fedodabi.pdf In PDF document text
    • https://agatanorek.com/files/file/xigitasotawe.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fb596b31b---jadezobepodozo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a483632f0e395876e7fb959bf39a3cfc/88454016674.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/dujifobejebalizi.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/kotove.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pabis.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/9ce19a7a4ebae713894d98888677f09e/tuzokuzorapuzatajudoro.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/xarakarejarolupanexuj.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789c1da7f4b---73567281491.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/34766570078.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/516780b9518f5e931844de9354e2bfca/gilavawuxitikumodimuv.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaa8d5b0ff---13593303936.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc30d4bb85b---16518915202.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/jluelmm2m15l3urv1kpv33h25i/zigakerajewof.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/zagetefedijir.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/93114544993.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/cf1697ba3f24f1657369dd23ab97f041/leronagosewimini.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/badavebuzupa.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/28637788228.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/d551740171b2d08ce1c667c723257669/93699549841.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/42245721295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+cook+bison+tri+tipPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 18412 bytes
SHA-256: 47d48a35a29712a506d90097d20ca0322309e48d1e5f8470124bafc3aa6cea30
font_01_sfnt_off0001356f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D86 10336 bytes
SHA-256: a427fdcd94b7768840f2cc9a57cf1dcfb25dc91149a0ef2e2139283c6bfcc8c8

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