Malicious PDF — malware analysis report

Static analysis result for SHA-256 a670655be24b348f…

MALICIOUS

PDF

87.1 KB Created: 2021-09-21 21:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2303a6a1c8f8ed8748ee57a506876a0 SHA-1: 50ccc4086f90b979f790c8277497807542812d24 SHA-256: a670655be24b348f24652c0ae26cd83403cc1d93799e9cb26d2d4ff4eb2e9e52
206 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan threat. The document's content is designed to trick users into revealing recovery secrets or private keys, a critical security risk. It also contains numerous external URLs, likely used for hosting malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cructi.ru/uplcv?utm_term=can+i+delete+trusted+credentials+on+my+phone PDF link annotation
    • https://glaze-metalart.com/upload/files/kafizomiverafubofuzazev.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/bebaluzazopasapupemufe.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/30424115668.pdfIn PDF document text
    • https://cubic.is/userfiles/file/vafelesenedufawutufupata.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/pazobut.pdfIn PDF document text
    • http://davcpundri.com/css/file/sipujomulipiregan.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/pakevat.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/32618333746.pdfIn PDF document text
    • http://attlas.center/userfiles/file/rolupepiru.pdfIn PDF document text
    • http://abnicum.com/files/file/xejupab.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/gabowoziposagovubek.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/45518984241.pdfIn PDF document text
    • http://babamoleskine.com/files/file/88505737834.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/xuzujitawulodozozubetowab.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/34743834411.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/85872228149.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/31888062446.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb3d3cdb77---26059808185.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/87164583253.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/vomijufimidigora.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/43602623285.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/konaz.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/3463999973.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_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 18712 bytes
SHA-256: 36f93e37d2b8daa7bbccc12f4b28385615cbd3d39b35bb7d7de2e8b82b305e98
font_01_sfnt_off00011d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 11024 bytes
SHA-256: 74afd60f461af332cf35c309639db7f24ce1dec8d94f21a5f12f5cb02f82f8c7
font_02_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1