Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fe7e3df19b2ec9…

MALICIOUS

PDF

88.3 KB Created: 2021-08-24 21:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c322a9efce412263e3dd06e4326963ac SHA-1: 09afda7ecaeb03012b4d6594dece5c0e3a0df813 SHA-256: 67fe7e3df19b2ec9aab46a15c58fbcf5affb148c1221c84942127cdb827216f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It includes numerous external URIs, many pointing to compromised WordPress sites and link farms, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://smidgel.ru/uplcv?utm_term=a+walk+to+remember+full+movie+online PDF link annotation
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085dfc2783c5---3146609870.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/muvitiwidabujum.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/86147243206.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/jogena.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f68b139918b---bilofeji.pdfIn PDF document text
    • https://glory-aqua.com/userfiles/file/21587742986.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160812e5d10db7---fenixosomililulanive.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ccdcad320---fagavoku.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/52030281069.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/94261961761.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8fe67d7e5---85752320413.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/96564061008.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fdb58a056---61645518606.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/4b543d74cd6ae58779c417daf1406459/56643250266.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be372ebdfee---soparidog.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/55718935257.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/36591064194.pdfIn PDF document text
    • http://flexa.cz/docs/file/xikoju.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/xujani.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/wimunosewononujer.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/41d735ae80e6554068c4c47617983d81/82311525167.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824a296ba43---voxafokumoleketejesejo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc18e9d2a4---gitiraxerulewapakof.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/eiolm3e191ptn9l31g3cipn8ts/fivubukazerozozuderez.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 17176 bytes
SHA-256: f2a6bf086a2604505111335bd2f5dec1a1cffb35f06b1af455f6416e0caa6796
font_01_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A34 10672 bytes
SHA-256: 19398cbbe6c7afaca7be93182e1622eea20f7dca8d2337ae6fed41a518cf501b

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