Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30b28f9f21b0868…

MALICIOUS

PDF

97.3 KB Created: 2021-08-07 18:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c386b2a26f2629564f9a309b1f6fe1bb SHA-1: 7feb19e1c5d7d25e7a916d505f5f3ee635a10d40 SHA-256: f30b28f9f21b0868bc944dfd254ff1ae2e207c1313189dd4d319c56693dea3eb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://93564497.com/userfiles/37570043605.pdf In PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/rirawozod.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/bekolexawirisaf.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cb77a20e5---bovexugamukuze.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/98958969017.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9f36dac8e3e5e42323d7003e92efe989/fewuxodenasovojilenuzipez.pdfIn PDF document text
    • http://sparkpro.lv/content/file/82899650825.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094058f805a2---tulalitife.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7130b01756---sevomafevadorifelatepuse.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35c069145d---woripeme.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a192487b85---fosirosorexisuwagimolifam.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/kujipowodixudaxixer.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/semoli.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa5a3c852---razelapotun.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/17vc3vbm533joenb8jg4bb93p1/50979363148.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/7335285270.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/juwodibenekirabul.pdfIn PDF document text
    • http://armanetti.com/images/welidi.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/11417905365.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/15120452543.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/sijk7tkld0plarq5cictkaj8bc/zemonesokut.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/burudeludukopi.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/zetinunuremepapugo.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b8c9d6350---87726309768.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=best+workout+to+lose+weight+and+build+lean+musclePDF 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_off00011594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11594 18320 bytes
SHA-256: edd073a82063464441432e2cba7fdcb1d51c142c36049d34127c8bd41a08df5e
font_01_sfnt_off0001443a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C51 11288 bytes
SHA-256: bc85587b3f8e8421cc7ccd646e1755531a22ad05064cf2f52e8dee4aaac7096d

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