Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68c1ab8fb276473…

MALICIOUS

PDF

82.5 KB Created: 2021-09-21 02:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b092a29b99c55afe4f138b13ded3bd37 SHA-1: 06f3830dad57a8eb10fc0295eb048164e1aab1d9 SHA-256: e68c1ab8fb27647369f4a0ef39521e401784c5b62ea060fc0d8619d05e6fcbef
296 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of a phishing lure. It specifically requests recovery secrets or private keys, indicating a strong intent to steal sensitive user information, potentially for cryptocurrency theft. The presence of multiple external URLs, some hosted on compromised CMS platforms, suggests a broader phishing infrastructure. While no scripts were directly extracted, the document's nature and the embedded URLs point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://krisoc.ru/uplcv?utm_term=how+to+erase+data+of+lost+phone PDF link annotation
    • http://archinfo.ru/uploads/file/lopajonutoxepiwepojedojur.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/zukeweje.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/fezodadakivasu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/46b19ece2b449782ffc0bb3b5e4a30fc/vimivigaj.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/32228431413.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/6onm54gq7ibu0i82t2qvilqldj/83462137641.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/73a0bf031deaa8882e2e949439764578/66997879975.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/44173757739.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/digesin.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7750999da---82586133859.pdfIn PDF document text
    • https://digireg.cz/upload/roxexozo.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/79126580070.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/depeniwapimitolofekerexe.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/xojitisitorirexubufog.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/farixa.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/58089761985.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/85390544064.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/77546354131.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/migajalokinefirupiz.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/5349433295.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/62896031504.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/wigene.pdfIn PDF document text
    • https://novitas.ro/files/ladadatepizokakaxopofanar.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/gerajesimaporigabeduma.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/93624341080.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_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 17396 bytes
SHA-256: 6fb407e3fa7232a42406c655dfe9799d3be827446076eff9a60a20a79eb98b96
font_02_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 10580 bytes
SHA-256: bb7559538fa71c7d3292aab65304da6473cd350aa3a039f6bb819f2b848ccc8b

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