Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f02f76306d75066…

MALICIOUS

PDF

85.7 KB Created: 2021-07-04 08:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b797505b894bdb21b61662cc00bfff3 SHA-1: d77498def7b7629bc771e7cf34418c4765757bc5 SHA-256: 6f02f76306d7506610196d86d37897ad6d69178f6d33b1ceb49a2255018fd6a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/16654dad33e002099da92a8f779f5f74/49091309520.pdf
    • http://brette-animation.com/userfiles/file/33398188079.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/04d222ec36b66474cf64e1abb380b845/36121803421.pdf
    • http://automotiveenergy.cz/userfiles/file/33861478762.pdf
    • https://himanshikitchen.info/viking1/uploads/files/busagifuzedajuletilidem.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/be248ef335ff5fe24b1d2fabb5238034/jetidefogunufize.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/83641528440.pdf
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/9512872833.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/6pdrcvdmep2qs340bifc3jtqpn/28299142590.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87a54ea79f---19339475428.pdf
    • http://intelekt.biz/uploads/pages/files/rejidanabozuzosojogaxij.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/398515a1165f24d7a685dea43133b4f7/75884482418.pdf
    • http://redfordunion70.com/clients/869360/File/derikawofokidixabijejeme.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c29e7148b---dipoturagufofuvu.pdf
    • https://twr1115.net/files/fckeditor/file/98453045968.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/26646767969.pdf
    • https://kis-u.com/page_data/file/20210621224935.pdf
    • https://topupdana.com/contents//files/65252483464.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0784b0e200---pakafivamubuk.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce6607e3c8---xipowegutuxusewoduwutiki.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c89dde4fc18---kajarolilopawaximum.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/0f19ae80907740cd68537f690cce7408/tamugogevojerefivigi.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecfe26c74a---vesezuwikupadasotopomim.pdf
    • http://americandeliorder.com/uploads/files/vorev.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=db+gold+double+long+etn
    • 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_off0000ee2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 16792 bytes
font_01_sfnt_off00010646.bin
8aa54a23d30fee166a0fb8ddd37cb6d93506eeabdb6f22ccb805dca749c16f17
pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 10144 bytes
font_02_sfnt_off00011ccf.bin
74a87a93c00642a2c674aa27922e171ba50fb839c95512bad49cb72403692044
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 17080 bytes