Malicious PDF — malware analysis report

Static analysis result for SHA-256 6195faa0d4a28882…

MALICIOUS

PDF

75.1 KB Created: 2021-09-06 18:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 67f32e9e13f5091585c4b24e399a3295 SHA-1: 7f277318a195d67f7c75f98af33aa32d712d1665 SHA-256: 6195faa0d4a28882b08f339d5956cbc97a629b42b0cf363d776429174f23759a
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'. The document functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures to download further malicious content or phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://falegnameriacastiglione.it/userfiles/files/livimedigutarogipoporu.pdf In PDF document text
    • https://mwasafat.com/uploads/files/renofijujavukisoxufakog.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16123540f3c0f0---79176409387.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/xidatazoxorefeb.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/689ddaae761b81af913fe100c6419f9c/xanufuzilixeguferuxe.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/dc94024ba95cda317f7db349ed8910d1/10698917598.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/zekuwosoritifadifuseja.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aafab1568---8160088714.pdfIn PDF document text
    • http://bidhichand.org/sahodyatarntaran/userfiles/file/volelenagapedalabizuwipox.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/397a0486b91e314e9e794b55aca9013e/4569364219.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/46231414701.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/httfaj7tgncritv09ro6mkfnr7/bixebirigukafenixewe.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/xenogonurek.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/68271048047.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c0ccdd078b2144fd79630f15ceacc02c/38470234366.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9269edbb8902ab797c8e3d7337f29a73/zebaxufokotuno.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/52591272736.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/25264218238.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/47643098738.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/11132547745.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/a4e01b033cea294a1f9ad0334502d276/1665792772.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/94079125187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=droit+des+affaires+maroc+cours+pdfPDF 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_off0000c113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 17408 bytes
SHA-256: a3035af89373d55f864bc3296d735df89aa8d29bd289df38480a572f8354439b
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 10732 bytes
SHA-256: b460e2da186d4e55e75d88238c7467b16506f712a32a9cc1beca6dc3c610e315

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