Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67f85c32ddc0264…

MALICIOUS

PDF

86.7 KB Created: 2021-07-06 23:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a159ab080da0153f7734f766eb1569dd SHA-1: dd2029d5d681e4ff58091e592694815c4a593ab5 SHA-256: e67f85c32ddc0264a0d93fe1515ee890cac029cb10ece089819aa01aaaf3af45
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream, which is a common technique for downloading and executing further malicious content. Several URLs pointing to compromised websites or disposable hosting were extracted, suggesting the file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/90712281077.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f4698fee---xuwududeg.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/32225648a58da8e204d9d869775b0bc4/fifet.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c370c69d2fa---fetelogak.pdf
    • http://giustizianuova.it/userfiles/file/46652182655.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b9c6157ea996fc017fe9abc082ab50b3/82431169048.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e01260b667b---sonifisuxopivezofadem.pdf
    • http://sincaremedicaltour.com/js/upload/54228252362.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/hls828vviq6oblr3709jtp3fid/81585696454.pdf
    • https://twfern.org/upload/ckfinder_temp/files/20210613034724.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d53fa6be0c---56871636211.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072581a3c027---lowilanav.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/nokokemavafep.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/48bpo89rrhtpl7h8pflmvfn386/gepikokexegawuv.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/f5ikvsr3n5v70g3ahfb9jcqb0q/zovibelesifojalobafovafo.pdf
    • http://permanentnimakeup-brno.cz/userfiles/files/buginepepizedixusen.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/nulibivaruti.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/203c86db03ed6833765819cc04438357/14661479007.pdf
    • http://andlupa.com/userfiles/file/25524237432.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d202bd8823---54939911360.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/j9s9vg10jid8osf1mvbapldr49/petabokeduvitijababimuvak.pdf
    • https://mps-india.com/userfiles/files/59316175738.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sex+and+the+city+watch+online+free
    • 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_off0000ec23.bin
4c39403c8b87b6a42486672e2b6762bab0bc80e19fc7d69025dba4c603ded92b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 17916 bytes
font_01_sfnt_off00011b27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 16792 bytes
font_02_sfnt_off0001333e.bin
952a4ea8eec638a223e4d1346d9213564d7a7be1c323331e73aa12785edfbd93
pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 10784 bytes