Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ea5fe1d9055a9…

MALICIOUS

PDF

192.5 KB Created: 2021-08-09 17:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 395a3fcc63e2b1d486af293ac2140257 SHA-1: 933187cca398d9e6c815f69b760ad4c384805123 SHA-256: 117ea5fe1d9055a991aa8e7918bce24eff7bb395b5146cfb9707e2024821e797
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms, with several pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9555

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://aslimitada.com/userfiles/file/jotadewalinelifinaj.pdf In PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3e1111c5---11888051609.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/e768386c394ac7708ab599e2f9cbc4c9/pokusidomemagi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/f7emnl78bdj1khb39cidgm8otg/59119422116.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/semopivekomowufarifaburux.pdfIn PDF document text
    • https://adikkedua.com/contents//files/jakenuripurupijumiwaril.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/vasadejipenarumipebukuzov.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/97513a1cb62bf57ca7c976b94e7d151a/sabumijenegiruwuso.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/57787333976.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fac7841a230---tufapubarov.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/87609440921.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210621215651005.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c50e68f8d---latemumodilebi.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8154a0fc41dfe520528d05d79543f9d0/jotezazesixik.pdfIn PDF document text
    • https://bnovum.hu/downloads/91090408370.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/55758300826.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd07faff73---98326201149.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/15224286200.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accf16eb6ef---34047918295.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c677007c6e9d6d7fec9b862755305117/dejevusetujadobebid.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/2c5e5f0eff7fddd96c9c4c749b939b69/vumarunaguvulurabana.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/pafixogadafobab.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/33fmg5p1cbcvootrj8jtd47cst/21483096666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=miraculous+ladybug+season+1+episode+1+english+dub+online+freePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BAD 20296 bytes
SHA-256: 753c46a9c1bce8dc3edc2f23dfd002b94ad4f8204d59867a3ac31e4495eaa62e
font_01_sfnt_off0002a11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A11F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002b92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B92C 1744 bytes
SHA-256: fec92d45633984122bb6a77548ba41f31784000fcf51e10816da5745c54c45a5
font_03_sfnt_off0002c169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C169 11200 bytes
SHA-256: 6bbdbc8b4dacd59671b6bb7b82a4a6dc1a75897e390b57dd5a8f87fb54b71585
font_04_sfnt_off0002db2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB2F 16416 bytes
SHA-256: 8846aa40f118102c73d8939e78e17b7b18e90ae9c7186d658f7627db40740a36

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