Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b034abb1ef05d0…

MALICIOUS

PDF

90.8 KB Created: 2021-07-03 09:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ed5976229a09b68a8a8e3b748a1cf13d SHA-1: 3edd74dcfeb5cd9353af69b118e018384987b8d2 SHA-256: 20b034abb1ef05d002d130809785e3859871d1b1c72471a93ca9b36e1e68791f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. Although no scripts were extracted, the structure and URL findings are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=pdf+data+into+excel PDF link annotation
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ikp0gehquclvni4cne2g10bdgk/67274083557.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/j4n3jo7fj0r4nuu3rojiodntef/mixibonefusotufopoxafu.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/24501070074.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/96287880213.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/pafusamum.pdfIn PDF document text
    • https://0900107678.com/upload/file/34380001538.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083e1d783202---fatidoxuwatigurezetur.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1b1660f7b8d50a30bb8c50261ee6c0ef/52822424049.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0d2ae161a---25340248619.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/vanupemud.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/kadovasor.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/zogatogujotekofafigo.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/02e5c3090a87f832600a293844be0f65/25960611891.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e2b148f4c8bc691804da56c08f6e85fd/musof.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7b46b0ef53312f8efd478be3694ab81d/numamajixufigoj.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/05p07fskv19kcc7givo71d1dnr/zuvutonuvovoke.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ca324dbd684908df596f699d99931223/sumik.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1d89a8ee43a9fec4575978994c93eae0/rumebutigusifad.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/b3c3f44ad964838d9959aa92575f71fc/pafafaramut.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c80782546ba785152f821d0c4b4a5e2d/vowazufugenabuzurogu.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10304 bytes
SHA-256: eb26fdd45e6cf5097ba9bf8d0cf3c15c8688a591bfb682f0423e6f28a17a17ca
font_02_sfnt_off00011b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B82 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off000130fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FD 16744 bytes
SHA-256: 410977acad1227fd24ef8deaa3e1756683a32af00201e10f52eaf7164d66cf64

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