Malicious PDF — malware analysis report

Static analysis result for SHA-256 3112e8560dbd9d3a…

MALICIOUS

PDF

106.1 KB Created: 2021-08-12 18:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 0fccc4f87ba33228ec3d6a989d7dbd0e SHA-1: 8ed32b9603f1763ac83b8598f4bea4b16dcae0d8 SHA-256: 3112e8560dbd9d3a3f0f5234d32f3c13b3e10decad9c688f167b65abe6848723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://huntic.ru/uplcv?utm_term=bedava+t%C3%BCrk%C3%A7e+dublaj+kovboy+filmi+izle PDF link annotation
    • http://boxshop.mn/userfiles/files/wesosawoboxaniwe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e533595aea1a450ac823c08a29274f85/novutawekagofufoj.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/pagikudadogiluxaxam.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3268cf8e4---pesukikibarux.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/69767111694.pdfIn PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/12193912381.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/cc59ae1d2188dd990b6d3c2130349210/82062543704.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/15876261055.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a96e24729d9---sulipotabina.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077639adadb5---89190753981.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b19cbe77a01---54007921459.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/kodogigote.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c850c52821b---newalarilepegenibibolet.pdfIn PDF document text
    • http://nfc.soo.jp/file/96441528087.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9c8e816d29c52820614aef3795804af2/22976045992.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/lbtrp2kfqbl6hrfpee2s74tec8/lopalaburowenopit.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a33f38fecb5e6fe01062b25d6e540b79/51704768270.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9bd530918af48ead4a12231bf6c3dda1/nurisekigipijenipozeti.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bb157b58e---motepivigunego.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/jaxokusapavanuxejexixire.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2813ca06eb---bilutaxabuxatod.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/rulutukisef.pdfIn PDF document text
    • https://bio86.net/fichiers/71792620804.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/34332558716.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/lesetupiwitesomela.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off000130b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B3 21360 bytes
SHA-256: 0b0c905c8db0d8544b8e871e783e5d6dba033aaeece93ee06ca98f930c6e7c52
font_02_sfnt_off000164c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164C5 11388 bytes
SHA-256: bac9aa16e80554cb2d7df6599348965d5ae0c621c4fdcb509c51bdf3afee0f9d
font_03_sfnt_off00017f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1