Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2e1665572d942b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 23:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 278c6f870472a05cea0dc07e9dd07ef7 SHA-1: c6505df8902b348209ab699c1aeef5f8736681a3 SHA-256: 4e2e1665572d942b032451c8dc7bfaf1664d1b7004f8a3754252a745f5b1a838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as phishing/trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links are likely intended to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://anhuishangbiao.com/upload_fck/file/2021-6-17/20210617173133745164.pdf In PDF document text
    • https://contabil-fiscal.ro/mm/file/92862135274.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/xegibidososivasazi.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39e5b7a529---74854507167.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dsiq4du4bqketlqt85v4i3ek83/finajigomutijilapijosisi.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/16361355128.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/98087420466.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838191a262---89018633219.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/458b6a1ed9875545c1268c9a6c955031/nojobofakuturaj.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7d71c105e---giwomovuzurakomowizebit.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9723a6279b0550f464cff7affd0e04cb/borele.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/rruf2g78nmeklohn3mukb2p484/50761784349.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3361aa0a---18552960641.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/munigebofexujelalaruvetag.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86bbd3dad5---15942386428.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/96837804029.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/xifowavubozipisudomitunu.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/c90s4e3krkh0v584kd267mt4r4/1339134622.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/q8dtom6lu2q3fqc5r0onh8q27v/nuwurelapot.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/dubijaziwi.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/79k8dj5bp2foucc20koerhcrl4/xosabelafifelovokid.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/60206176763.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/7ee2c39f789738ba185f8a73119efb10/12318165044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cyanide+poisoning+pdfPDF 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_off0000dd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD33 10576 bytes
SHA-256: 0ba58f75bde115322b8360eaf1b5028d6f7c4fe304c2c295bdf78f439c87869f
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 17776 bytes
SHA-256: a453daa4267c76e9c1e0689f463a90ad7dfc7acf44bd83f368fc0a853255e722
font_02_sfnt_off00012354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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