Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da9914b4fae215b…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 12:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7cfd9d62faf575450134cebfe434f365 SHA-1: e4ae6a18a292250d1b8e8a1be38caf45d59c1850 SHA-256: 0da9914b4fae215b483c58aa61defe3ac97cb99b9dd306c13ecc1162209c821c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161427a8ed8ad0---46373440.pdf In PDF document text
    • https://interativacorretora.com/fotosempresa/files/pusigoxebiwodubebubogoviw.pdfIn PDF document text
    • http://xn--12cf1djdb6cbcafdbu1f1cudgcc8am4wf7htgd9de.com/ckfinder/images/files/beporerejabodubigig.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614088d393f68---21821737339.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/54363738294.pdfIn PDF document text
    • http://tecksco.com/upload/files/jevubibutus.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161334a79b6a50---46715237322.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/67388959030.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/zidito.pdfIn PDF document text
    • https://yuktogel.com/contents/files/wuxuritisiwalaso.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/20033207946.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/5967731575.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/dovanujut.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/vimapatujixawolupuvafuk.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/82146755747.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/foxiduxo.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/88259802311.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ebd2i6h5k7ujkc0ek05sqeqese/vusebex.pdfIn PDF document text
    • http://vladekoservis.ru/files/laviraroziligoli.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/piluwetudubunotewuxiki.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/52226795924.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/2059362104.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/75475120271.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/28339039521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=my+hero+academia+season+5+ep+2+eng+dubPDF 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_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 17888 bytes
SHA-256: 892fd7a378c738836bdfb7023684623b85a0a62a05fafbdd251139415d7c8319
font_02_sfnt_off00011b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B36 11416 bytes
SHA-256: a8dbf15802c48246b4fea67e96df8c8370a3a7aa78e2cb76567a8be283d16f1e

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