Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5bd34dc764c013…

MALICIOUS

PDF

133.3 KB Created: 2021-07-20 10:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cb68e5c4361eb47393d289bd8534268 SHA-1: 30c81436d687c2539e105ab5f03f5c6629cfe22b SHA-256: eb5bd34dc764c0132cb975f2f431d28e5f34d12d5fb1d0ee95425384169c53b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://russkiivopros.com/images/FCKeditor/file/napapobe.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d5937471a---jojujovuxanatizosonip.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/363c03e77d335d21ebe810c2990a4fff/bawuf.pdf
    • http://praconsulgroup.ru/pict/file/39647968177.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d2e21b760---vajon.pdf
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/kolutikirem.pdf
    • http://casier-a-bouteilles.com/file/7525285928.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd60d2c692---nodivuxetitasoro.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d49852dab---binemekegon.pdf
    • http://szao-spb.ru/images/news/file/47171514352.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72d948cc6d---45136700753.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b467e12bf4e---kolujemuxebaxo.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e126105c345a534ead184282194aefb2/torazamogelasaju.pdf
    • https://deniz-sogutma.org/img/userfiles/file/nufadozezelejonorujetirif.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/95e386aa71c0fefc0e06a1b7accccb96/98378399465.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608593f9a90a6---lanozoxuveza.pdf
    • http://liyangah.com/Upload/file/vobodelesirelatod.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/5e66c0d3d70af2ee921d986d1a32690e/tasawigero.pdf
    • http://amoy-art.com/Upload/file/ganedeweluw.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ad52809cc---vofomovaregumomuv.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b57b5ff6---zojeruj.pdf
    • https://cs168.tw/upfiles/editor/files/zarofefezezumeligog.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96cbd7bdb---lifegirixixatolefof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ford+escape+manual+transmission+review
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a5c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C4 16792 bytes
font_01_sfnt_off0001bdd6.bin
e761ab57aa32f7fc549305f39addca5363aa1bd1bb3f162c6b0aedf7f34501fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDD6 18388 bytes
font_02_sfnt_off0001ee23.bin
44c68d10df49b0400c20ed2d12a2bf4ae1c4ce233dedca8c519a45d00b2b2189
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE23 10904 bytes