Malicious PDF — malware analysis report

Static analysis result for SHA-256 992a24d4ff45b2a3…

MALICIOUS

PDF

97.5 KB Created: 2021-07-01 21:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a24433426d1d6d4c0b6396f45c6779c SHA-1: f70d539db3c138224b903ab8fb450b96548ff860 SHA-256: 992a24d4ff45b2a38db2d4e9a4b4835a3f1c20e1586a92efb94672a256e5002d
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically requesting sensitive recovery information such as private keys or backup codes. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting or account takeover.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://inwebjor.ru/uplcv?utm_term=change+http+to+https PDF link annotation
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5d4ee78000a5f816771848411f264b6f/zusixosiwatedopebezu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3eed42bca731fc190835c084f4300e62/28029430962.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2876a5ded664cd7c3abb1d7f72228970/gopelusakimamubipomodiko.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fcd5e7ca2---kagakigusizigowi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a4740949---timelivebogak.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/97392441928.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9b5836bdc06d1744c47a7af0c9b340dc/56880489308.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d77fc1e57b---negidu.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/mndctmi0pa8ph4p9i7mtpk1gro/doserasenelosozefusamerek.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/22259409723.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/580827076a156c3cefbb967c481ef493/50806135426.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dead6d69daa669f8ae9210ed62319dac/pakideresineguzinibiro.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/5kp06t01tera3blhbr0kbedpt0/54391631670.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/80798154036.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6dbaaaaadb382451e0af7046ebeede71/13122885539.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/doludaroxumetinebapuwuv.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c7f7d26d1---96489968953.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/41b975595624cbe66960521ec207a9bf/64327537925.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e3dcc1f5d---wevoviverawiw.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/009459a36fa67c6eba9637ded600e701/64711166866.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d482ca1703---tunopo.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/2c76a67f6312a648a9e7a613d51a5c94/53632902507.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/87236773898.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c408de4cd9---83551460253.pdfIn PDF document text
    • 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_off00011bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF7 10324 bytes
SHA-256: 47f656042c5acf1b7de42075c5046380797993a5d0144cf9ed2d3b4cc80356b5
font_01_sfnt_off00013340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13340 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B52 17612 bytes
SHA-256: 61cb251aaed702b1a565f5a2f38fb6cd39235a17f7c3a444bf12acac53516aa1

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