Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfc4ac98bc5d225…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 13:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4c44279f3732a7163e3dc5430ae09347 SHA-1: 929f94a0cfb7201fd0dc9e7dbda307ae701dd709 SHA-256: adfc4ac98bc5d225fe952ada0c0b02628bdec81cdda4d6aec50c24b89c779afd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites. The presence of these links suggests an attempt to lure users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://garglob.ru/uplcv?utm_term=bowens+xmt500+manual PDF link annotation
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160997d11c81a0---47207247312.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/37jg3ch2fhh0bodvte92rkdd95/narufovimubupebamur.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e76e55181f---31078611914.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/10888559420.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5f21c7da07e9946178eb978d90b99db8/35357551316.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/92760704936.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/subozinotaxevawerutudufup.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/dutipijovomukuvaturofogu.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/dumorodoniluxuzox.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/suvaxuvajupokewinomijiz.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/371ddac1fef2e608d6a623714e2037e7/sapagewadotusazodobamov.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/615728921.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/20557910125.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/desexigazuk.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/29332569655.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612c47379ea53---20373027166.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/welunig.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/43dfd8efe5c8e1c54843269253e2097a/vinekugubiriwom.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/norirotuzobuxobimadilo.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/55540254651.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/simapozefa.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/mexesevixepaxofosifijax.pdfIn PDF document text
    • https://bselink.com/userfiles/file/paxijamodaratuw.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/99368487865.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7ba354034d6eb31ac166d72ac5c8045a/15773025241.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/46212216758.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_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10676 bytes
SHA-256: 4835d5a10fa6e566fbcff9b93c0447441734faa24419ff2a60a3630191fa2f1b
font_02_sfnt_off000110a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A7 19236 bytes
SHA-256: a752e146718d834005c8cea4c10ac7aecc8615ba8eb14c70cb884b1f316926ca

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