Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29834c347dd99d5…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 13:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e9963c76ac7c4ac85e2f23f4d6dc7d8 SHA-1: 894b76efa0eb6f095e487b92916d116982325875 SHA-256: a29834c347dd99d5bf0132b13cfbd4f3e724f07c18ca9bf5f8133960f95c0e69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://tunesistudio.eu/userfiles/files/50258567310.pdf In PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/nekejunozasadidaxa.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9acf84655---bilewemelagawavulew.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/tupemipobetipezowomep.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/78637165588.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/zorileledufijelalodopinog.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/rifopujemamokipojaxogur.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea44a4960c---rejamilinomelesapafolu.pdfIn PDF document text
    • http://standardamulet.com/files/files/57913049350.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138d05435166---mogegifi.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613984fe995f6---3519280981.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/nogikererej.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/mitelofokatuzizuvujow.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/komupa.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/zolow.pdfIn PDF document text
    • http://vitrine-prof.com/files/zuzivutogax.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/46g1vtontb3u66qe3vvn72judb/21619318745.pdfIn PDF document text
    • http://asqcert.net/files/files/53099002079.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/xepewajipogabanita.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/79115416633.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/madowuw.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/45436191086.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/ditagewu.pdfIn PDF document text
    • https://cncunse.com/d/files/53838077441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=photo+editor+for+32+bit+pcPDF 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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF502 18192 bytes
SHA-256: b2df24ef4b3613b63f7f857ebf1969bd7b8670dde661e3ab91f553b274c10aae
font_02_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 10672 bytes
SHA-256: 0055b67922fc201bb2571f59e1921dbf732b9fed1969990e43a2d433bd9a94e3

Open this report in the interactive analyzer, or submit your own file for analysis.