Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bd235ea056e94c…

MALICIOUS

PDF

79.0 KB Created: 2021-08-16 19:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39b2620a19401891738fb312661082e0 SHA-1: c933612f661bf43e8b286078dfaf9b73bfa432b1 SHA-256: e6bd235ea056e94cbfc379b1114d1331be89df6cd3ba18414afb51968bf22250
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript (T1059.007) further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jplfim0j55vonhg93c6h4ial74/tubetovufozogek.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607715097bf04---gowupoxorokadodujidozezo.pdf
    • http://happinessgown.com/upload/users/files/67571381368.pdf
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/jekaxepolapuw.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074d2671acfb---samase.pdf
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/41491825481.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/37344939795.pdf
    • http://emeat.ru/var/files/45813407779.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/kufubido.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf98bf0d2a---silijukenimawukam.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/227f855c86922857e879999b7cb5ef75/vekoguz.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087af904a6a7---38996435040.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f1fcd9921991f73f30931b60e89c396b/65653758364.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160986bb00685b---51697633000.pdf
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/gimatumex.pdf
    • http://cristal-in.fr/userfiles/file/9177427163.pdf
    • https://zionapostolicministries.org/uploads/file/puxeg.pdf
    • https://atcotourismtravel.com/userfiles/file/rekike.pdf
    • http://119hero.kr/userData/board/file/63596710266.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/05c3dbd48226554985fd19b95ea48eb2/nijuxevuxizufunisibir.pdf
    • http://peach2560.xyz/js/ckfinder/userfiles/files/16992936229.pdf
    • http://botosani.ro/img/uploads/file/tirawuxija.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/14038275008.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c16f3a1d5c7---lojatuxemusaweratesunox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+do+i+reset+my+kaspersky+trial
    • 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_off0000d42a.bin
94b86ea825e1a2de8e6fd561a8545b93e2e4d5b3f30ee02faac4f4414dd379e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 10732 bytes
font_01_sfnt_off0000ece7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 16792 bytes
font_02_sfnt_off000104f9.bin
3e3d0e916afa7573f96053d4e14281fec681d13be7ce3d40692c8e413125a18e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 16048 bytes