Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf396fe4c979a9e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 20:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 950fb5bfff0caef459baeb5eedea8b85 SHA-1: f7f94f95b6ab3907fa90e42b8670ac3e9f163517 SHA-256: 9cf396fe4c979a9ea6a90bdf14080741dc2b2c7e2484e7ff788be09f0237c319
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to numerous external URLs, some hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=junior+android+developer+jobs+in+egypt
    • http://www.kevimotor-rock.hu/files/files/60234290092.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161451dd833aee---fufudadofub.pdf
    • http://clear-es.net/yamituki-n/uploads/files/69730328668.pdf
    • http://hooleihomes.com/cms_images/file/76679458911.pdf
    • http://shipsupply.ru/userfiles/files/wopabebusefatuvizimora.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143631d9940e---sunasuledametido.pdf
    • http://www.enredmail.com/templates/files/idCliente_/file/namepixudukofujegisabofuk.pdf
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/vibuxagom.pdf
    • https://maggies-handmade.com/UserFiles/files/mowanogagesile.pdf
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/rufamoxi.pdf
    • http://bon-mar.com/fck_user_files/file/mizivuzirifeted.pdf
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/38076576567.pdf
    • http://teewer.mn/ckfinder/userfiles/files/61527438990.pdf
    • http://theurbanbazzaar.com/userfiles/file/87094949649.pdf
    • http://nhabe.com.vn/ckfinder/userfiles/files/88652184848.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144244e0ef6d---3658019519.pdf
    • http://evevoyance.fr/adh/.-/file/gotosoxaga.pdf
    • http://kayapaliinsaat.net/file/97462702622.pdf
    • http://szsahsh.com/uploads/files/52392200616.pdf
    • http://campfirewtx.org/userfiles/file/97983507556.pdf
    • http://dhf-china.com/d/files/51793983797.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_off0000db7d.bin
3533d1832ac9d270ce9f052f198ae337616de0602f699789ed217be2422e1c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 17996 bytes
font_01_sfnt_off00010a28.bin
0f794a6c2e1e207add8a2c2161d462b9e60878cb3e077b5b2242992184eb79b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 11108 bytes
font_02_sfnt_off000123c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.