Malicious PDF — malware analysis report

Static analysis result for SHA-256 92667b81fce3ab22…

MALICIOUS

PDF

75.7 KB Created: 2021-07-01 19:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e04c6a1e6351516ad6f40dfaa650b1e0 SHA-1: 5d5cf2af8803349a3bcdd8a42992bd8704a90e27 SHA-256: 92667b81fce3ab227a02834a493f9f427f3b4557bfd1d02fd4f91c2e56b49e0a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to obscure malicious destinations. The presence of embedded JavaScript, flagged by heuristics, further indicates potential malicious activity, likely for redirection or exploitation. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb983fa14c8---kabilemido.pdf In PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/xudojiwigegugowinize.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/1998721596.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f55580ef778d9205002c36c3835b8148/fipejovajabasizawuvo.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/413ad9a224829c397ef80d8d0942ad16/wugivekegi.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cb669ee97---popumebiwunubagexiv.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//witiruvonuturavifis.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7e1f72ae5---kipefinezukulanumuxuvena.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076249aaf953---rufopatigagivun.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/tcfe5vgqh3mfgu9b4fpiblgl4d/puzumogujoxibewibi.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wujixijedixabe.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/19621947515.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc8dbeaf25---kaxudevoluwetipeno.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/87f8fe4e72df828212295548ec0e7c19/fafarekusefidamaj.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/kunuzelexutobuganufizuje.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/54741270586.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/silaporoboguwo.pdfIn PDF document text
    • http://altinay-law.com/images/file/15257981978.pdfIn PDF document text
    • http://hodori247.com/uploads/files/tekuwopozuwewajidi.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/76e5ef9e8c252e92e1bab7932e69c2bb/vederovalemofem.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e78123e14114248e63837867504514a4/difiworij.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094d32535611---39483241880.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/wowikifamozatip.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8fe89f214---70352850819.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd52d72c28c---73719358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=christopher+pike+books+pdf+free+downloadPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/62307646585.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69C 15860 bytes
SHA-256: 5cabd0b047b7367d329aa6311ae1a1cc47e421a32903192cfce0aab90019c048
font_01_sfnt_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 10944 bytes
SHA-256: 2948c30756dd82c02902864480a6d66d24d5b887e61a2e9d56c885613c2749bb
font_02_sfnt_off000108d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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