Malicious PDF — malware analysis report

Static analysis result for SHA-256 4063730248bf34fb…

MALICIOUS

PDF

90.8 KB Created: 2021-06-26 03:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 72358bad9737213528589b81c834ddf0 SHA-1: fd60bc872181a00f92553c819e7f1b0456220be9 SHA-256: 4063730248bf34fbbcd668a0e09efca28e50e756cbc4bdce51346eb02118b5d0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely related to T1566.001 (Spearphishing Attachment) as a delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077aad15e985---zavabizoxulul.pdf In PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tewegikepuzene.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608233d5c98e8---57949984534.pdfPDF link annotation
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/adff1c8a1fa3b121b3f78f95b4438747/54324608853.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a59b924a1b6---37427841417.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/dagopete.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/25624185217.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6684ccf81088b910e1735599879a79cf/22420383546.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/d05142c3f0f057f24d84e27cff334d1f/fajabimara.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/5168a601e4269edf957d7a1c118fc1cf/vumuwaxobinefelili.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1c0tu3kvtr4fp1uujkg0bcc5k1/25133408162.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/11504095011.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/35174366351.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/f1294ceaf729d9a19fa8aae4aff677ab.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2609099cf6---masiso.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a44c2123---modinizirijejivi.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/51165143606.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/82791740825.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b60645354d5db5e717f07d3f8c140494/35603936036.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/wupifonopogik.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ne1fctgaosi3gs2bsb028ja72g/bajigunotibuxesirofusiru.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/5968050585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=james+maxwell+electromagnetic+theoryPDF 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_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11864 10968 bytes
SHA-256: 3cf94c23e74f233ea2bd235aa4a515423134565ba93f9ff60955ced42b53bf14
font_02_sfnt_off000131ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BA 17048 bytes
SHA-256: 93c1f94932fb0f465f83ea3964f263bb342374fdacc76e56664f8e47dc003a6b

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