Malicious PDF — malware analysis report

Static analysis result for SHA-256 af34f2841036fe54…

MALICIOUS

PDF

96.9 KB Created: 2021-06-26 08:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 70c255a0b905cd8c6064ce94035f66f3 SHA-1: 3bee191df6d680938036755d817ca6bca429be4f SHA-256: af34f2841036fe54bd90a68ce6bf3656ac0459e71be7a2663aa90778077a532f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

This PDF document is classified as malicious and exhibits characteristics of a credential harvesting lure, specifically targeting multi-factor authentication or one-time codes. The document contains numerous links to compromised websites, likely serving as a distribution point for malicious content. While no scripts were directly extracted, the presence of PDF link farms and the MFA lure strongly suggest an attempt to trick users into compromising their accounts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6018c6f7---kofawamu.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/177fd55f4d2d2d5afc4fd8843351866e/putubarewogonomow.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/89d8lni7md15rdrk1s151b0gh4/sedagobuxoxateril.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f90c7a7d28161458bceefe59a7d18a92/90480240034.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/s0an88m6ojlblg6mqpk48l9mj7/77594402209.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084a984591e4---puburaket.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b86fa67bb1---33418469327.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bc541440c8d---bobunogam.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/gifuxatewameriluke.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ehl675btojj092bv2tp4vnago8/59734195448.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082623ef3d63---mubojomajofamenufijasavo.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084188bca44b---88526432473.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e56bf8605eaa1cb51a86d937cd62e7fd/gaxawejojosuxolo.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/27067717829.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160871d3be3b1b---68880589844.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccc236bfd8---12687409933.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd30aad18---43942739981.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918cc173df4---nadetufabonebokanimiro.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/94691e6559a1c2c859786e2e41b4b133/nanirevawanabowuweguzexu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/335058f96b0989255188e37d6d2ee54c/xisunamosewuwu.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/14185330029.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd87aa6bd---67583419006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=federal+form+of+government+pdfPDF 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_off0001192e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192E 16684 bytes
SHA-256: 4b62e2f5b69559f8b48d73e692660901e5ce2ba30284e542b519fe7854c0ab28
font_01_sfnt_off0001449e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1449E 10624 bytes
SHA-256: 22a262974e53fa9487b753b05d706c1c37ac8ac2364fe359d742a54aab64156f
font_02_sfnt_off00015cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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