Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e44d65d285eec51…

MALICIOUS

PDF

73.4 KB Created: 2021-09-08 07:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e508bfe0efa6946b82ff2087d4cfcae6 SHA-1: 34cb7004605fa68d3edc58efcb2f17111539afd8 SHA-256: 0e44d65d285eec51604746adcdc50f135a916d87b248357830f4f3fb960e1480
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to host and distribute malicious content. The presence of a visual download button further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garage-ys.info/js/upload/files/3607237261.pdf In PDF document text
    • https://hmanagement.net/userfiles/file/vifijimazubaxunasofaxipo.pdfIn PDF document text
    • https://ekransamara.ru/files/mekudijifolurif.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/75687360750.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/werobogivujaxigupiworose.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6988972585---vivanunededa.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6da8e330d7a6e7469c1e674e9a95c876/ladoxovibeke.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4ssdjflljq6rql113joe7od9rv/kovufijizi.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc2173ff45---17918652868.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/63532021866.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/679a6a4c75311769db08e09143f4ab55/talefuteziz.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d9dbc04cb---tokesizezimaxuvivas.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/fejuguxifenufupefagono.pdfIn PDF document text
    • https://digireg.it/upload/tumivare.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/nomofuzagujexezarofarun.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/vaguf.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e63abea1c---70570658672.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/puwopazazowaza.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/7ea03ea1c7db4dac4366faf502b2f78b/4606376237.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/borewivagerojijuterivuneg.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/34997709059.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7ea80992---vinoduxa.pdfIn PDF document text
    • http://usagimatur.com/files/others/11948226360.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/kt0el4ddeje4ttehokvc1sj3d0/fowugetidimezede.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/2gfrgntfgtodcp0b9pfgf09hpd/kabovuwejuwuxuwix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ordinal+numbers+worksheet+for+nurseryPDF link annotation
    • 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_off0000bbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC3 16404 bytes
SHA-256: 1ff3a7adcb03ba1927af75f39f175b800ea1e4d26bd6bed81edfc3456994d30e
font_01_sfnt_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 11176 bytes
SHA-256: 3b6c73901b24ffaf68c57c9f3ad028aa35df9f83a1a6bdc3ce5fef1bbb69f55b

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