Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd60cb300b29729e…

MALICIOUS

PDF

85.7 KB Created: 2021-09-12 10:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 008e7021bc275408da105660de740cb8 SHA-1: 4f4576de77d90e769ad99b02dad38678cb1c192c SHA-256: dd60cb300b29729ee197bf5d8b4e0869f5e710c12a4fe3036a156c325f0b20bf
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests the document is designed to trick users into downloading a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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=how+to+reboot+xiaomi+phone+without+power+button PDF link annotation
    • https://flour.co.uk/ckfinder/userfiles/files/gepopufezemoz.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/bejosewidobobexowu.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/71480360561.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6hlduog8rh0bffph9td3ub50c5/61581675375.pdfIn PDF document text
    • https://akconta.com/uploads/files/85620569252.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/pezusajokevotegizunob.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/45314107609.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/fedibuwuwozamusu.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/27972642086.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/62908835027.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/12e5ef18d0aa46af0d164b43287d78ff/minaduja.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-06-07-59-40-42.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/10817758505.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/36953841494.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/59224701276.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/magumixezugobapipadi.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/meresifawa.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109030351346130.pdfIn PDF document text
    • https://andrejc.si/files/file/84314002208.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/96366969653.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/29886535192.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/gogevamakitudazadubemevuv.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_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 18492 bytes
SHA-256: c6a9ecfc2e5f139689906aa5883b6e889870e9a4281b8681e52a73c7fcd48454
font_02_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 10720 bytes
SHA-256: 4dd158ff1c311ac0e536feae80b6b534ec708b3cebe06ec293516550324f0419

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