Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d992ae545dcc0f0…

MALICIOUS

PDF

93.9 KB Created: 2021-09-19 01:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 201815b0df46b81e0aee9ae08353a8e8 SHA-1: 95e4d77f35afc9dc182e1871b05a10951e61b6d4 SHA-256: 6d992ae545dcc0f065d588ec96b060cb24dc4c666fbc568d638e72aeff86d54b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URI and link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://coretry.ru/uplcv?utm_term=ms+office+onenote+2007+free+download PDF link annotation
    • http://sicilyontable.it/userfiles/files/40039722866.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/15166622600.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd107c866e---zunugogajovegikodamidijen.pdfIn PDF document text
    • http://esistore.de/userfiles/file/20479294218.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/2053986815.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/97379903894.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/xifanasexiberuwumutu.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/bokuwirujedol.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/notimemidejofexasafep.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/pizixile.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/lejofure.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/zisipuvajetabupilovoj.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1613c81d96229b---letoremumi.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/lakebadanuselesixifota.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/35239259809.pdfIn PDF document text
    • https://avflash.nl/upload/files/janutubureba.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/sizebusiboxup.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/84837150661.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/lenaneri.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/jomefazerivaduzubanuf.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/49584420658.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/51450722162.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f53dece295---mewunaj.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/47651340584.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/linik.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001192f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1192F 19056 bytes
SHA-256: 7d4a738bc76bab15ec3878348b657ce8a576442ed9054d5ee85eb3ac372a5d38
font_00_sfnt_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 17332 bytes
SHA-256: 872fb3e691eee8fa4af754f3ab4aed019d627844b6e885036952838fd6a388bf
font_02_sfnt_off0001382a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382A 10840 bytes
SHA-256: 94fde0931624676ba51f3a4d0b64527fa74e2efe746eb60d4f85d5a08da6c34a
font_03_sfnt_off00015184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.