Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc58593d4b73607…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 15:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0cabd130f35e03bd4dc9bc7755ffa7db SHA-1: 5b174476ae8cd7c848140aac9d6f131970832809 SHA-256: 1fc58593d4b73607f3ecc106a561347fbca5bc45be6a902433a97bc86caac5e8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress uploads and other disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external malicious sites.

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://sofupingame.com/calisma2/files/uploads/32114234212.pdf In PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/jikezowerapolelap.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/5c2d9533da3bb391e7f593f681e68203/28648963402.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/19117775478.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/95762849533.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0l2es9ojcoi279j9v0erg6mm4m/xenivakakax.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/dawid.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/78952337516.pdfIn PDF document text
    • http://frappsreagent.com/upload/files/57303703210.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/92d729e48075348aeb5e7f1648dc9718/lisediwadaloguge.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a846632f676---konafasudu.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/49351369359.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/28379163227.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/pepowulosaxizivogoz.pdfIn PDF document text
    • https://temahr.hr/files/55855884945.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/zasoruxevowuta.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/184e72109e2f569cb185f12fab1e30a7/sezosejosevapumaveviwap.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c442cd7e32e---pinaxutikexamezuraju.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/sizevotoguxadotefalu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967a2cd5217---zikovevaguxexepu.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/xazerosonolozivuxolataf.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/90412703859.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=peavey+sp2+speaker+manualPDF 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_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 10596 bytes
SHA-256: 737afe8e1cb9b514480b624907b6c1d00494cc2ccbb639fe632ea718cdc52a3e
font_01_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001057c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 17736 bytes
SHA-256: bce5f184da6efc7203d52cfd21bfaa97f0127e9226c0da3ee64c07c84bec66f5

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