Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7ded155a9c4a70…

MALICIOUS

PDF

88.7 KB Created: 2021-07-03 20:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfdef34335d1a14f117c456c3abb2fb8 SHA-1: c9dbcfa90330026a7d0c077c5ae0dd35e0293e79 SHA-256: 0e7ded155a9c4a7094957270512bd8669877b0de084f4b7547f568f3366967bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to compromised WordPress installations and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is used to host and present these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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 http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091536f73319---penesuwovuvikud.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7863aaabee9dfaaf5369af3bdc967d8a/xobenevix.pdf
    • https://personnelcle.com/userfiles/file/dunexudikamijuk.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/o516n8h1105g752280o03pvr31/famivav.pdf
    • http://aven.su/userfiles/file/simenod.pdf
    • https://kede.org/userfiles/file/45111122995.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afba0380af---35134377068.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dd7e2db8ed9a91680adc99663c803d5a/93415132828.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09dd5ef454---dorabiluxid.pdf
    • http://medicare-darmstadt.de/bilder/UserImages/file/gutonefatafovogofuk.pdf
    • http://knuhpharm.kr/userfiles/file/20210703220337.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f37ff6d8049c65663463a49503fc984e/polidobukujirulozokumi.pdf
    • https://sbufficio.it/file/40739183917.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tgr20fhp572jvfd5965s9k910e/88586049652.pdf
    • http://hotelclinton.it/userfiles/files/jomasoxituw.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de830aa6c38---getuvusivalixumusal.pdf
    • http://epoxidice.ro/mm/file/loxona.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a89d8a30f07---82223786798.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4e7k28p60o9vnctjnqp4cbma9j/telukod.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c5a3c014f---gisavaxorexaxusumebu.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f63a96bbda---rosumim.pdf
    • http://chaitraglaze.com/uploads/12055511359.pdf
    • http://scro.ru/pic/file/jerozo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=gingersnap+cookies+soft
    • 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_off0000f75f.bin
1682bc31e1ab9e6569b538ed19ab8fc3ac698ebea39615bedcac4e13dbca0096
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 10740 bytes
font_01_sfnt_off0001103f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1103F 16792 bytes
font_02_sfnt_off00012851.bin
492cedc36b7252d2445ead4dd63157583bdfcb19de6774dcdc648f02ae7d7e41
pdf-font-stream PDF embedded font (sfnt) at offset 0x12851 17244 bytes