Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b0beb01c0c466d…

MALICIOUS

PDF

90.7 KB Created: 2021-07-01 00:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6717c343299f4673e8bb2ce2a175344e SHA-1: b3466206422dbc9995b8d93080ee1155797ddc91 SHA-256: d0b0beb01c0c466de413552d0ad2ce1b146df9243023074156905406629f1b49
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to lure users to potentially malicious content. No scripts were extracted, but the overall pattern is consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 5

  • 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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980f354eaa4---72144910783.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/9d0f660e67ac48f08b222aeaf94ff9cc/25677510735.pdf
    • https://termoformat.md/img/files/pusozubodiwipo.pdf
    • https://btegypt.com/file/zoris.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e39c9c8687---86279777781.pdf
    • http://babamoleskine.com/files/file/nurevobasabef.pdf
    • http://rcot.by/pics/files/dobekebupob.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c35bdd8a---maxivopifonetobokok.pdf
    • https://angkortaxiservice.com/userfiles/file/nurixuzexexuj.pdf
    • http://acecaalcoy.com/userfiles/file/vewupa.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608681ac98c20---bibekesebusu.pdf
    • https://amatnieks.com/pictures/image/88684846015.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/966194350d364ad1aebe559ebb0d2616/volosofagapupagaperasa.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc2a128ce7---febabetuwabaselaveroxedu.pdf
    • http://archerelectricsupply.com/userfiles/file/6986931074.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/2014cd8a176483f3abd3be27e0e226e6/66313167676.pdf
    • https://parkettworld.com/upload/files/wisifabajipibuzodefu.pdf
    • http://contextuae.com/resimler/files/nexobibegiruva.pdf
    • http://haenuri.net/ckupload/files/8714678008.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a88bfedc9fe---49723586226.pdf
    • https://zoldlepes.hu/userfiles/file/najuxutojujasilonokaliva.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/kixapatutazo.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5dh0g6sts7uqrnso3u5iqkb04a/sifipovuwojoritenedibi.pdf
    • https://pypconsultores.mx/userfiles/file/duzokid.pdf
    • http://officinedesign.it/userfiles/files/18473737536.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ab+negative+blood+availability
    • 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_off000100be.bin
67a7c6dfd63b5cb25679b871771c1818ce7eb66ae19e51feea2fccd3adf43ef9
pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10456 bytes
font_01_sfnt_off0001186f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 16792 bytes
font_02_sfnt_off00013081.bin
ccacc1a3e768a3f526a6a89f98c4dbc8851cbc5831999536ba58dc3ce395aea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13081 17156 bytes