Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edb86e1d5d79ff7…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 00:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 212bc10390ea82aef00b41813fc1d91e SHA-1: e08f2147f2f43653e952c2a2349c0827970d5249 SHA-256: 0edb86e1d5d79ff72ba9e0cb96e3c60ac1bc0ebafece87d660380cbc29250189
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://lafayetteconnections.com/clients/52818/File/tekobur.pdf In PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/59921938772.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/vadulodejidukegag.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/4hfvvon5comk0mn8jb8bb159ri/42265865111.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/xibewawesajupuzikojaja.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/59666190126.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/dodajosabafukemubokopum.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b78e59168---61493370859.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/27943460526.pdfIn PDF document text
    • http://ruihuitax.com/files/file/40865194835.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3bd18f288120f90353b324fbdc7905f6/voxefumi.pdfIn PDF document text
    • http://enricobarraco.com/files/goterobugapafafikeri.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebca99756.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/16568959903.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2270ab360d---40837129929.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/rixunironavivusad.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o8mg4cvigcmedo47j23ab88kc6/basopigugip.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/32usvdjrvsnj9e1eo980stbsh7/togovos.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/59986190070.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/novejekasoxarativevoseru.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/natafopikukizewaseriwu.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a2afb20f46708379b98063c4663576d5/petak.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/lomelem.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/lonapedesidisalojaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=example+of+footnotes+in+an+essayPDF 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_off0000da72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 17220 bytes
SHA-256: 28d1547d3d57de8010e6fedbabb75bb0aa47b6fd8bd32a2b05415a6b6036f5d2
font_01_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 10620 bytes
SHA-256: a6b872fb2aadb61119c9b9319c64cc489e597779b8a8f81ab46734e8e774b88e
font_02_sfnt_off00011f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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