Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fad94d27cd64a4c…

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 10:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ff26fd08d28fd4ed50f2a5199b55c323 SHA-1: 577263b56524dfd7ee1beba49b77504a5485e783 SHA-256: 5fad94d27cd64a4c43e801ef831eef8fdd967dd92c10622235fd1bc7327e5649
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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 http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/difuwakowor.pdf In PDF document text
    • https://cometsecurity.in/admin/userfiles/file/fumuxuwifoludirijuwutuwaj.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/tafoma.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/dorasenaxajagepepemugiwud.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/doxesexanul.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/galufotuditapupo.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/46949535001.pdfIn PDF document text
    • http://eternaseguros.net/files/files/litunuwotewasab.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/39245137579.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/73d3a95be74b4331c3c81247dfb48bec/wowininanuwom.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/ocjevfan1ck4i6kdf2094drctc/7390320331.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/46875258841.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/4b0e026493188f22f8f5006ca9b5b6d9/nozirabitiruwa.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5ddcbae77f4b71b7b3969c5ffa5baa6b/pakorojixusafejavirasivok.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2275c6f9f---83344212038.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/sesetakinotofimogolu.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104290909468160.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/xupusitezuvujep.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5cf407df---vukisifipu.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/mevinup.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/53463059220.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/dac0b1769631eb103c5533f9790659b0/zopagifivon.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/raxakemibugejilogepa.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/20440006192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=airbag+lab+chemistry+answersPDF 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_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 10880 bytes
SHA-256: c6ba4e2b19a72a0b0d1a2e8570fde2efafd934f67750eed2ffe36b2485dacb2d
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 18756 bytes
SHA-256: 9fc1f14ddb7f8da3f0c31865d099f145c5536e65135cfb2a2cbf5fc28993fd05
font_02_sfnt_off0001433d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1