Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df056c94b7648a5…

MALICIOUS

PDF

256.0 KB Created: 2022-02-22 08:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: f6b076742c79e5e5dcc4d54246fd80e2 SHA-1: d772399934610ed2ab09d7629b525f0952dfcda3 SHA-256: 6df056c94b7648a5bf8fe35f74849b5fa4dec2b6e84118f4c7e119adeca3877d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically flags an image lure linking to an SEO redirector, suggesting a deceptive tactic to trick users into downloading the malicious PDF. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7707

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://yubit.co.za/XSRYdR1H?utm_term=malicious+age+full+movie PDF link annotation
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1617fdeebeb334---65041863459.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/63649671526.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ef6b80f9b---4486734572.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/18236875641.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/laviragaruxisiwuroz.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/wosojuxufulunedasudugugu.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/jovelujan.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/94529551271.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/salexore.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/lubiwupidikumut.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/65028869426.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16147d80235d29---25964050511.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/98790238316.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/16080489886.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/pujakolinenafi.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161688e95272b7---20609412289.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/75953130241.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/taxebad.pdfIn PDF document text
    • http://web5gstore.com/Files/files/wofatomezosevaziwuvovav.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/53161042858.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161ffb80896a79---lixemoxekopu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/2cb794d38d73f117ea890aced688db89/4836649017.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/20750338496.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/loparonuzokimakadunolog.pdfIn PDF document text
    • http://aalatour.com/basefile/b2caalatourcom/files/79387592337.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/7593359692.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0602dcf40915bac9ede84b84ac05d630/desomudilijib.pdfIn PDF document text
    • https://www.kossuth-csepel.hu/inc/kcfinder/upload/files/3278077510.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6sve6lupp074kvbbguqifhhstg/xapogonakezeponovurow.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 extracted file (font_00_sfnt_off000392d7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000392d7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000392d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x392D7 10536 bytes
SHA-256: 1fd0bf725cde8a95635f7f580943a48f37260e31dbf5030c77c272c66f806d9d
font_01_sfnt_off0003aaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AAEA 18112 bytes
SHA-256: 1596198a870f30305f15484266d3658b3c3958b6eb83e90a47bfe23035b2ef3e
font_02_sfnt_off0003da1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DA1F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9