Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f15bea0637d56e…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 11:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: baf48c714a485d9a49ba54e5ce33cfba SHA-1: fa7e269147a80356301a86af8396b270b66c9df4 SHA-256: 32f15bea0637d56ebeed97f029dbe436d479ff21bf0aed6584f7bd168e5488d2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://murphysbeads.com/clients/54316/File/rutowob.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/huv98j0ps3lnu7quaq2no93ql1/85035080336.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/45228f61a8ba2e0ea9ee4022a0cdd234/30148044714.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3tp06alq01d577g1kj2vfhkufs/potunoxofexovaw.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6d79de1d972a63cd2c6f30b6ccc673ed/kekelopidefame.pdf
    • https://travelstore.tn/userfiles/file/46548045229.pdf
    • https://zippy-inc.com/app/webroot/userfiles/files/92365717313.pdf
    • https://nanyangtextile.com/userfiles/file/bafabatodudokebuj.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9409h0lrrjlh3jd5pr48t7i7mt/85136326400.pdf
    • https://netiko.ge/img/Data/file/kixejeda.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf4339924---poxetexalubixesexobamu.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/905f38c0343c84cdb9813b0d574507d9/25487300427.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094b649e0083---balilugoderolesorosalil.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1cf746bc2---5692287198.pdf
    • http://utuin.net/files/fckeditor/file/xabilutujimir.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160734dfc625b9---18730449957.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i3fr0g0186087ufg3f1ih5afl4/61319210574.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607786600b8ca---33078760034.pdf
    • https://balajitutorial.com/admin/userfiles/file/bivowufevalakolawuzojazox.pdf
    • https://syteq-pro.com/userfiles/file/zetedanakilidofaxunexuse.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/dae52cee66f6c53f56de2cc400b89558/58382403170.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=when+does+a+kitten+become+full+grown
    • 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_off0000ee28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 16792 bytes
font_01_sfnt_off0001063f.bin
b1f3cc8c0d728ee199d9cb7cf75a557de7fceb54380ad8dcba63dd8e77edaa2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 11336 bytes
font_02_sfnt_off0001208d.bin
4640fd2dab9a4909484e78e7df816f98ac729ce8fba3ad42c78b26caac051bf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208D 17636 bytes