Malicious PDF — malware analysis report

Static analysis result for SHA-256 8021612ff72fbbba…

MALICIOUS

PDF

77.7 KB Created: 2021-09-28 03:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1f8be0a4c3562f14e6bcd53a080aab07 SHA-1: 7ff1ade1af967fb18ab3559df5f4aef8cb0fba1f SHA-256: 8021612ff72fbbba7b7e6a151993b0b0ab8fcf56a18ea72b84016bbd65b3991b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://homokkepek.hu/editor_up/63888824292.pdf In PDF document text
    • https://vnjhanoi.com/upload/files/komojekunozug.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/78849881526.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/55762643948.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/59407799039.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/0cd108bb7ad97fb039030a7bac450b3c/10367166599.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/zidog.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/38907015332.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/32896952463.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/50078253737.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/5679263236.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210925_F7D231B53F49D035.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/lajatava.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/koxuxaxebedilimamonuf.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/rakubasutazilelamav.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/zazutubomalitaruzi.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2gc6i1m81q6tluokmqa6haa8c2/21640152594.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/2869714368.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/ad85c10458b25b3777834c7bc0c5e096/vaxamikatobidovi.pdfIn PDF document text
    • http://pneusmarene.it/images/file/85422969112.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/lovexetuxigovazujunax.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210910171808.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/39087595176.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf398823c5---79397194207.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/mosobatekawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=naa+peru+surya+naa+illu+india+telugu+movie+onlinePDF 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_off0000c0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E2 10992 bytes
SHA-256: 028717563a2a9e0dfa1650d9df94d095a59f445db12ea28555cd463d640225d4
font_01_sfnt_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 20776 bytes
SHA-256: 7f2f4dfd64c85efff5e8a2c98b5fcda1e37119da878223a3eaf5bf0ed85d93d8
font_02_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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