Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bc060b7fd24b81…

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 18:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8af33f36360c38923845e78033cee63d SHA-1: 131fb95e740b5f14a7ea63521f12581e5b6e456d SHA-256: 44bc060b7fd24b81b380c00b2c64a5b494849004b7332cf160288ff0fbcc8163
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://electriccityusa.com/images/fck_uploads/file/17661409828.pdf In PDF document text
    • http://ingegneriarossi.it/userfiles/files/11524975607.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/1addf05fdd373d3997307eb1cca00693/63172353860.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/48433992532.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d611826ce3---66482744565.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/kuzenivoteb.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/rijevovapun.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/nozineforebonolid.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/89609059361.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/84851446586.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/9715117407.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/fisawotosilutozamo.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/larirojarimoragodol.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161397ee2e5b96---fawodonapamid.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/putoviguda.pdfIn PDF document text
    • http://guchen.ru/d/files/xalafidoxofedujapedit.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hthcrnlm553npqqlg3q4i4dkd7/mudopo.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/69809862814.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/92138645534.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/4213217144.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/38978057618.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/fepowovakite.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/galosirajad.pdfIn PDF document text
    • https://akemi.ro/hirek/file/karokak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=vflat+scanner+apkPDF 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

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_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 17716 bytes
SHA-256: 605bb81e9b6e5915f89b32cc14b22cd88bf8c3fb8e4fa36c6e733119d95002d1
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D1 10324 bytes
SHA-256: 90bc545b020215b032c94cd91656373c82883a7be6ea3dd43c3c55a0fa947fec

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