Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6c9045623a1e90…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 10:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: df956b0337980cfa715f79e12fb6f7bf SHA-1: f46a852d106d790a92abf6ac5e06d4ce93cd0a79 SHA-256: 0b6c9045623a1e90503a084d876e49f1673082d288f75a3b4df23bd9ec077e74
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1555.003 Credentials from Password Stores

This PDF document is classified as malicious and exhibits characteristics of a credential harvesting lure, specifically requesting recovery secrets or private keys. The embedded URLs point to various compromised websites, likely serving as landing pages for the phishing attempt. While no scripts were explicitly extracted, the nature of the lure and the numerous external links suggest an attempt to trick users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=recover+icloud+password+with+email PDF link annotation
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1c09bb52605b4c271d77a5ec0d469330/94414243838.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161305a65ae58d---zotovutexuzivivipotale.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/93751360297.pdfIn PDF document text
    • http://budka39.ru/files/80886775810.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210906095905.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6iu3mfbe9v8bub6bf5n6a8ib37/fopekuzi.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/semusirawepugokufowezu.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4751d258---79688694727.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/30524923499.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/wenanogijokixirenezota.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fff566e9a0ebce4796161cd5909b6607/40510696476.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/valojodizanoxuwejit.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9dj5ivijjhpfd4hhc9e5t7vo08/nonoputubivafaxowefupufob.pdfIn PDF document text
    • http://fivelscope.net/fckimages/56466681384.pdfIn PDF document text
    • http://seamacros.com/upload/file/43310882831.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/rupudoxedubewaganox.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/52416558016.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/sizisupemuwenuvujeg.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbde204c7f---86058490396.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/jabufixinikizedo.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/wiwokoxulafamegarat.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/rduegur1f5i9aghofuils35t17/xopejudivowavubojelok.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/b7d2b4603539a95ef960ed5d73de89a3/15749176205.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce3c78c1c4---92950872093.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/4998570515.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_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10972 bytes
SHA-256: 578130877ca6e9fe947cf067eb30e91b060682e546bcccdc5d14d8e2d3b380b1
font_02_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 17228 bytes
SHA-256: d3063ca5e3707bbb6484d3bb591e4ba71b45f951d06632fb6b0868f8e8089625