Malicious PDF — malware analysis report

Static analysis result for SHA-256 4507e6f29a08e676…

MALICIOUS

PDF

83.9 KB Created: 2021-06-28 06:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2079cdabd6c9ab1f0dbe7858ea625b7e SHA-1: 824f03bfdd23662d25056e07856f13b3baf1aa23 SHA-256: 4507e6f29a08e67605b0f7e5d01a540f922201dd80a79a6384292b26252c5db4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=example+of+a+demagogue
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/788661bf0c0eaa2bfcb4370dffe08c41/soserepebakozakaruvex.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab12675840---68575171551.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/k7gskpdq6tl5koo0bao65fg1pb/31852775418.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97c9326c92d5d4a17770c43204ff0794/fuwowuw.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b4ab703d101d56d4a8ec7bdef58b25d5/vewopumexetenuxuxibukop.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade5d752bff---jijumakubizuzopok.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ad58680ff7d3e649a02389bfd8780f9c/gixelabuwimefoga.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/dvn5aenhlqg725l8n311bg03k9/foguteno.pdf
    • http://inglewoodreunion.com/clients/68690/File/bozero.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c29de5748b31b6503ed9a176aee0cc04/jitiraki.pdf
    • https://bandotrading.it/uploads/file/zinukekirorewoberar.pdf
    • https://atl-50.com/files/file/tolanalemuferunofis.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5p8lad2opd0vap6fmn4rv0ev77/22611287854.pdf
    • https://pima-alarms.rs/slicice/file/70638526674.pdf
    • http://allmedicus.com/userfiles/file/21931672979.pdf
    • https://daaeportrett.no/upload/file/91120145139.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/jhqhkqglre78b91him7tcha7hn/10094682003.pdf
    • https://coevent.ru/upload/files/99410092082.pdf
    • http://congtydaihai.com/upload/files/28357870619.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608448ca63307---xotumatojawopadofowajebuf.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/87299273118.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d975f5ed45---vonedapom.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ce94c995---bulabifejunasejirom.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/8jjg59qod0jn9ucqg863fv3k06/jigubowuviw.pdf
    • 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_off0000e3b6.bin
0226fe785884f3f8882da7dbe83d197a533148adf65879972834bfa341f85721
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 10464 bytes
font_01_sfnt_off0000fb49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 16792 bytes
font_02_sfnt_off0001135b.bin
44205b42417288050b81a24a4d65f3b8efb584f6fb4a322bee142965d4ea3f1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 18444 bytes