Malicious PDF — malware analysis report

Static analysis result for SHA-256 befe154c084932c3…

MALICIOUS

PDF

168.1 KB Created: 2021-09-02 06:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: be638fa23af31df3742d5f459df57b80 SHA-1: e1e14dadc0d977d94027c6f1050ed391605fe68e SHA-256: befe154c084932c3dd2cca1363f9fccfdfbbefc5a5e4892b520c3c68fefa11d4
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://numen-wow.com/userfiles/cloud/files/94814614341.pdf In PDF document text
    • http://norilskgu.ru/userfiles/file/getadezujele.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/42553646526.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/730de26ffe7e7fa020d2e661251af5b0/86427916344.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b2a77f556---7263498688.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/lipijomibupagopu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/41433d22a542945c37d93f8b6e944e56/gofajukixotox.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88e2beb451---42163006274.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3vqnh558qommvevaouvtb2num6/28067348434.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2442da87---rawer.pdfIn PDF document text
    • http://landpas.pl/upload/file/lixale.pdfIn PDF document text
    • https://samudra99.com/contents//files/90713045080.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607437b8d0c54---zodikopumodivanisiwin.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/19818242568.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/zefufojosakojefi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092affe395ef---75322705440.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/fefuri.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e52f73cc060d9c1f19cc4ec49c56b01d/98319455214.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608091932cddc---poxolawekotepaziruruvig.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///13697187778.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611a8fc320ee0---67881181540.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/rorunek.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/tetidulusinepisevi.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/42535105703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=and+consequently+in+a+sentencePDF 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_off00022edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000246ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246ED 19388 bytes
SHA-256: c90ed021e495b835e35c82fb8de494859c65382ea2b2dff5121ed10172089ca3
font_02_sfnt_off000279cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x279CC 10604 bytes
SHA-256: ce1f4e85a760d3c6eead3476cf55e040bcc86a7968dce20f48af061d1a21ca18

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