Malicious PDF — malware analysis report

Static analysis result for SHA-256 495bb15b20930b05…

MALICIOUS

PDF

73.2 KB Created: 2021-06-10 11:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 13ef932d01abd02a2233faae8d7262cd SHA-1: 2c333afacfb5621740d18b3a94ae0066ac6254f6 SHA-256: 495bb15b20930b059b5a71a05eb5f24ceb6736f2265b3f0c65abaf0d54b55269
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document contains numerous URLs pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious files. The presence of embedded URLs and the overall structure point towards an attempt to lure users into downloading further malicious content, potentially via a JavaScript exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=cambridge+igcse+and+o+level+business+studies+5th+edition+pdf PDF link annotation
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5bb722db7---vakafefitosalenoj.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/op832k7pl2lqjfos7uaaodjm9i/besaxazowikafaja.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/noxakijelilebopoxuf.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607667d75c511---janebaze.pdfIn PDF document text
    • https://avela.md/userfiles/file/82894871798.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/lipaj.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/unktiu6ush1p340e8oloeamhv4/ditoluwozikise.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/10495624087.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897c8d2b945---77472892722.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3900a4cc---88974868954.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc7203afb---nukud.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/5a30bbf4d88fbac7e35e54df09801f32/87618242407.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54f082dec---tefekodo.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/gilabotelidavibuwakefimo.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/xuzazerugufoped.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a6de05c16---96368228178.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a010a6596---77293633600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E6 5796 bytes
SHA-256: efc13cfaeda7e1f6f7438ab09e0584643cf312428be73d9096e20a23b24fdff4
font_01_sfnt_off0000e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 10500 bytes
SHA-256: 1ade1f1c55643c5d03993940777d8f7698e51f056736fe3a11081e7d395775fe
font_02_sfnt_off000108f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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