Malicious PDF — malware analysis report

Static analysis result for SHA-256 d500466299df9596…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 19:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 929217f0ceded36930fe2b461cf87f1e SHA-1: a5bb0248cc0bbcafe201c0aaa029850ed3d30c14 SHA-256: d500466299df959631ddea83008812fa6bbd8543886ea065fd53172a0d1e3fe8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier. It contains numerous URLs, many of which point to compromised WordPress sites acting as a link farm. These links are likely intended to redirect users to malicious content, consistent with phishing or malware distribution tactics. The presence of a link farm on disposable or compromised hosting suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/a159869a75d8d2d261fd98066dc66fa8/27264474684.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/0e95a181459b3c305982465c383d3a1b/duxarozeruvamapaz.pdf
    • http://snap-drone.com/userfiles/file/mewumopenedoderutoda.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9865adaa9---49439073522.pdf
    • http://petrduchek.com/files/pirovunudi.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/dfa63f874e8139879187e9ca9b115e95/mizoguzuxasepoli.pdf
    • http://newgrids.com/userfiles/file/ridewoposenilopas.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/7dslvuta1vu6sqsj4juovc7e36/gafexebubug.pdf
    • https://benqmusicworkshop.com/fupload/file/91915829897.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/abb2f0e31a6a8b7782f4fa8abfa915f4/95801938529.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b2029c6478d56a6205493e0db6656ab0/najoderezigo.pdf
    • http://controlsystemco.com/cache/fck_files/file/senukigul.pdf
    • http://accessprecision.com/userfiles/file/tubizuxo.pdf
    • http://moyamoya.center/images/hand_uploaded/files/bofejomudumupa.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/rituwikumidutedijopa.pdf
    • http://debschoen.com/userfiles/file/11174404402.pdf
    • https://aprilboya.com/userfiles/file/nurivulavowawidikepipa.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/d809477367939f2d15db32fea6dcee8b/3838395345.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/of8ohl3iimlo6qat66180crtm5/52292383697.pdf
    • http://scales-center.com/shop/fck_file/file/75350240752.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4966242bdd---12906622939.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e80546235ce1ad1dbc533ab9aa005c36/ximogirukux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cost+management+notes+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_off0000eca4.bin
12b27eb65b5766e631d64b24e4f82fd051321c77445131f903f9ddc663d0e39c
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 16900 bytes
font_01_sfnt_off00011849.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 16792 bytes
font_02_sfnt_off00013060.bin
91698c317206109e248f7ed8cd144009e69679f28f522b479bc34793696c6783
pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 10636 bytes