Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aa69068148f929…

MALICIOUS

PDF

81.1 KB Created: 2021-09-24 01:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38b7e36ac5b276bc941962c94f733821 SHA-1: f28b96e375b83cae1d40933a0d64e652c3431fa1 SHA-256: 08aa69068148f929e2ff661aa72e5914b1d406caafcfd062ecacd89b6919ac25
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely contains instructions for a password-protected archive, a common method to evade security filters. While no scripts were explicitly extracted, the presence of numerous embedded URLs, some pointing to compromised CMS uploads and link farms, suggests an attempt to redirect users to malicious content or facilitate further infection. The PDF's structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://mmeasar.com/mmeasarfiles/file/78515268311.pdf
    • https://majubesar.net/contents/files/67195692918.pdf
    • http://tatnhapkhau.com/ckfinder/userfiles/files/tupofawifepoxapufuvozit.pdf
    • http://imoroz.by/upload/file/31588123877.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4ffd56734---lurofugepokovusik.pdf
    • https://juraganmonyet.com/contents/files/71396302270.pdf
    • http://hightopeducation.com/cms_uploaded/file/gojesiguteberanulewejaj.pdf
    • https://trompis-tondschungel.de/userfiles/file/gifubivaxemefuwosem.pdf
    • http://macro-e.com/app/webroot/userfiles/files/tonizudibewejolibejuduwe.pdf
    • http://abwingssuffolk2.com/uploads/files/3548520842.pdf
    • https://mchs.kz/userfiles/File/vizufixakesub.pdf
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/67130253909.pdf
    • https://benmoonpharma.com/userfiles/file/bumojunefituxo.pdf
    • https://faktxeber.ru/resimler/files/debowedajejuzuwunibu.pdf
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/besipa.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/293397661c9d7e2a0a601ec70a439ba4/sirixasatarumema.pdf
    • http://mehmetrasimmutlu.com/icerik/file/66481864319.pdf
    • https://multimetrics.com/ckfinder/userfiles/files/jotopogosemomevo.pdf
    • http://reliancefla.com/admin/images/file/deliruraluwubajawa.pdf
    • https://masihpt2.com/contents/files/pifexupi.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/165jfh3p18inbictl7skjql9nd/54874913541.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/gewimib.pdf
    • https://sherwoodchamber.org/ckfinder/userfiles/files/gabanolelum.pdf
    • https://supermovi.com/userfiles/files/57247318981.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=blackra1n+icloud+activator+tool+2020
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 16792 bytes
font_01_sfnt_off0000f0d9.bin
36d8b1f794a932552ea1e858c5bca2fd78d03e0111bf8f62da30781e29f42b2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 17340 bytes
font_02_sfnt_off00011dc8.bin
df3278e7e688e054a48885d01d301b479423d63dc11958a67c28ac694cb29f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 10668 bytes