Malicious PDF — malware analysis report

Static analysis result for SHA-256 79393140164150bd…

MALICIOUS

PDF

257.9 KB Created: 2022-04-04 21:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: e60d168b8f2a05c011be26c5ecf31940 SHA-1: 9a5618821515b71d7175938055200318775b9bdf SHA-256: 79393140164150bdd327ea53738421ed857ad8f42f8c693397856421d420b5a1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one identified as an SEO redirector for a 'free-download phishing' lure. The presence of embedded JS and links to compromised WordPress upload storage suggests the document is designed to exploit vulnerabilities or trick users into downloading further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7375

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
  • 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.
  • 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://yubit.co.za/XSRYdR1H?utm_term=the+effective+reader+4th+edition+pdf PDF link annotation
    • https://inovadmin.pavicer.pt/uploads/files/fewejododeminosesam.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/46633850077.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/kigoxeturemepexeso.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/nesupiwuvedeminixipis.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fa38114afef---5809257404.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/162302e329d287---bonidijadakilivekanulozax.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/baragubemul.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20220310_034654_125.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/lebisem.pdfIn PDF document text
    • https://derfo.info/resimler/files/15285432844.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/30930519015.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1622c64b8616a7---jomixiwiwireda.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/56675791373.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/dovadowivagisorubu.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/xadogefarowu.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20220405010541.pdfIn PDF document text
    • https://www.kidilangues.fr/js/kcfinder/upload/files/2005123685.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/wowapakefiwa.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/162229b2ac288f---jefinipipovinokaxavixurex.pdfIn PDF document text
    • http://sbcnepal.com/images/file/85463924841.pdfIn PDF document text
    • https://mail.conepe.org.br/public/ckeditor/kcfinder/upload/files/nudajovadorujiwowatexug.pdfIn PDF document text
    • http://jovanrajsic.net/storage/files/jodozefedabagisozifofiref.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16216cc68d54c8---jusuvemozim.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1620c08550fb66---31013023800.pdfIn PDF document text
    • https://imotibulgaria7.bg/files/files/82139875804.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/162310b09e4266---fujalipekixodobupexoxe.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16246bcc6653fe---tirepaliru.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/55667807471.pdfIn PDF document text
    • https://stichting-pulse.nl/upload/files/dazefizinotimalobuvizox.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/85968623349.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_off000392ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x392CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003aae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AAE1 10608 bytes
SHA-256: 5d716e727ce9896dee09ed1cd2a4772899e5b219a2bbd7d2f4572f402238135c
font_02_sfnt_off0003c31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C31C 20056 bytes
SHA-256: 0d2cfd494272a9f0cc049218da5f7edc4cd32c0e6b6ce753c8e9404e7793ec29

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