Malicious PDF — malware analysis report

Static analysis result for SHA-256 0261283b299d713d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-29 08:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e8aa0f27e844ff6ca0e4940f4ceadd2 SHA-1: cbd2ffcb5080249dea41717bdaaafe09b0868e4d SHA-256: 0261283b299d713dc9d8aba40ed2c080993a1ca3e068ba32c32ddb2c1505b7db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO poisoning to redirect users to malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://hotelniagararimini.eu/userfiles/files/wotegofovozokelupiwesis.pdf
    • http://jedwines.com/cmsCart/upload/file/samorajadezejavazid.pdf
    • https://institut-arabe.org/ckfinder/userfiles/files/kosakafaje.pdf
    • http://www.gabrielamaciel.net/images/content/file/kokofo.pdf
    • http://joltiy.ru/uploads/files/tevolularuzazaramopasem.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/fa5736c30613be730ea631288a29bdfd/55467084686.pdf
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/kewijajozu.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614eb9283f166---vebubojitinidatusoramolu.pdf
    • http://studioboscono.it/userfiles/files/noramexesapo.pdf
    • http://candybeauty.vn/upload/files/fununodatopodijuwotid.pdf
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90493254504.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf3463788e---pusekawopajumefo.pdf
    • http://amandatour.ru/js/ckfinder/userfiles/files/kekobebikugotazux.pdf
    • http://php-lounge.de/userfiles/file/58357836341.pdf
    • http://perles-del-beya.com/userfiles/file/54257558218.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/solakimigovukute.pdf
    • https://cdmsig1.com/ckfinder/userfiles/files/99559033581.pdf
    • http://sendedianqi.com/upload_fck/file/2021-9-7/20210907095522205408.pdf
    • http://flexinform.com/hirlevel/file/merazanis.pdf
    • https://www.abandassociates.com/ckfinder/userfiles/files/53276923814.pdf
    • http://hanyangsteel.com/files/fckeditor/file/5989769046147744b73934.pdf
    • http://odra.cycling-recycling.eu/imgturysta/files/bidozamekotejibolurivoga.pdf
    • http://cs-web-design.de/ablage/userfiles/files/genapukob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=onlyfans+mod+apk+premium+download
    • 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_off0000af35.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF35 16792 bytes
font_01_sfnt_off0000c74c.bin
7d56dfd801ba1371066fc14fbcdf121b69a3dc4c47c2d2ebd8f80b657312882f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC74C 10976 bytes
font_02_sfnt_off0000e0ce.bin
f6e59510cfc9b9090b6358e1848af2e865863622be4286ed6eb4d3aaa85339f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 15488 bytes