Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e93cd7085f7ead4…

MALICIOUS

PDF

91.5 KB Created: 2021-06-26 22:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6b00c4dba846e77bb74c48323d62a6f SHA-1: 32685298a6151c398bbd33ca7ac73e81a1210e0c SHA-256: 9e93cd7085f7ead4ac00b9b6fc36755d4d6a7b72f5b24762678175d8a4dce6ac
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document attempts to trick the user into installing a browser extension or update. The numerous embedded URLs, many pointing to compromised CMS upload storage, further support a phishing or malware distribution scheme.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/302eab61fc2158d504331e496deee68e/50102418756.pdf
    • https://teddybestore.it/file/1429808667.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be87d7583---11689033894.pdf
    • http://mai-colle.jp/userfiles/file/17262585851.pdf
    • http://guojingmall.com/userfiles/file///larozenugaga.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/dc9714ab9c1126e92c8ccf9173fd7a4e/fulesaxilosapen.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/61e1007cc7aa4f4601346ac5c2ee734c/jekodisadekepowa.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a025978906d---lowafefutefewejud.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09ff97a8c0---bogizusataropubanomawe.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160934359994c6---76549067064.pdf
    • http://greatnice.club/updatefiles/file/fexenirefolexenitowifi.pdf
    • http://contactconfiance.com/files/files/40975979442.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/0005a5e56d8b8705f7bde58750cdde54/45635582604.pdf
    • http://rld-carbon.ru/file/megiti.pdf
    • https://nada70.org/userfiles/file/33836222748.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/fopitupezavivawe.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827af73fd41---4958080890.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607adf27c1b8c---vuxelajotagenapogotomez.pdf
    • http://netmutum.com/userfiles/file/pasavotejinelaw.pdf
    • http://bezagsecurity.cz/userfiles/93882749942.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ccbb1df68---7048686893.pdf
    • http://www.heksan.com.pl/file/zikizapuxebos.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd761f0b66---71012100522.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bookstores+by+me
    • 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_off00010254.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 16792 bytes
font_01_sfnt_off00011a6b.bin
01239c06f50a1152f30310f8157cc110af5de7aaf42e4ec7b7e3a8836bb422a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6B 10264 bytes
font_02_sfnt_off000131aa.bin
3ea98c7f2544836130ad68120ad7edce14c2496d40389868601dc506249c575d
pdf-font-stream PDF embedded font (sfnt) at offset 0x131AA 17624 bytes