Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d4e51638876950…

MALICIOUS

PDF

86.7 KB Created: 2021-06-27 20:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fb91e732cff457a9b362209f760d28b SHA-1: c2fe974240a1f067146a6eae44ccb93b5bbc2cf5 SHA-256: 69d4e51638876950378a936ad90937bfb98fd9411befbf8c3beb9954e35f66b2
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. This behavior is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/012f16af8ffb44df79e5ab0f00302884/tobonixowexim.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e329842515656ea31f78ea304c953fca/50957830432.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b09f4aeb5c---wifufiluviratogunakufo.pdf
    • http://proxima-design.cz/files/file/7695563780.pdf
    • http://coyada.com/up_images/up_images/47880019104.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/256c1ff2a040d9ea5eee58e6928b1a1f/94389568587.pdf
    • https://oddluzanie.net/userfiles/file/golirarufupu.pdf
    • https://cncunse.com/d/files/77488505723.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e71b36bbb---bularebilosol.pdf
    • http://isgsrl.it/images/file/tewelana.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3b879872d---87509755236.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086a9edc8a15---jozatabalupe.pdf
    • https://stiff.pl/ckfinder/userfiles/files/90037852053.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68bfaa7f6---40814582326.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/379de881df70b8aeb26920a7e4e66461/xabegufalagopotapavel.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/18d1e327c646f2afda2ee0f2db58bbdf/situz.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a5f63e97---wekatigobewepori.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0a7fea59191ea4ee5038e06314f58161/kupitugugapaxesupewi.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916f72da01e---42942004416.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/radufexutof.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/49322384450.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b86d24f05---75230838643.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///92713849445.pdf
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/kerevadalonekalizoguke.pdf
    • https://hissekurban.com/resimler/files/sewilujolikar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=head+and+neck+embryology
    • 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_off0000f291.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 16792 bytes
font_01_sfnt_off00010aa8.bin
f2ddf5461e40ed81e7daa419c7f8750acc95d656d103bd383717b8afb52101dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 10692 bytes
font_02_sfnt_off000122d7.bin
3b8cbbf1512a38a38cf9cac86177f6bb36f66c2b06eac48c34845cc2fdd3ed9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 16488 bytes