Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cd59b0dd4cb37f…

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 18:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9a79c85cea869678160cf1c0078df84 SHA-1: e17ca0595cffc7ba7ec7245f3c4808d3a5fd04a5 SHA-256: 47cd59b0dd4cb37f0ec358f19a40fdfc1a35c4f2dc532167162f1d8911aa0030
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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=marketing+mix+9ps+pdf PDF link annotation
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a5bb93ec3---14821718369.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d029b420db8e039e16b1ad7a4f5bbb3a/48550768927.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9295867bc5f02cb767b5059740f42fe9/13014626861.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/roraxapejoxasarefez.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dca242c7cbb87ac5f9f64e5f2ca3d96b/76601344247.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/dce109463fd032150b3fc7076d2bbe9e/vogokabotajafofafuza.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/65094708913.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vebiwaxupapupiwag.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/bibojetev.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/6885836274.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/jegex.pdfIn PDF document text
    • http://fxmeat.com/upload/file/eff24b67ccba7d1a803289ae612897d4.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/8hk3j12165ags87tjlu6ljajcu/11915424654.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/mowagodigijivabipegapaj.pdfIn PDF document text
    • http://www.polni.si/Images/files/nowelabajuxu.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/dozebixirumabom.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/58541770469.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/jabi7hrc26203c6uffdoreirma/diduxufirajolozafuxuluf.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5ce396ab3---28317847056.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/43063060594.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/93044996290.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/de5e11fa1ca9654880407d9351303e43/89013054293.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/munabuzoxuli.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/43840816563.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_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 11032 bytes
SHA-256: d3bbf0a0025ed44ade102f1717b61749a5fb72e54ad9e41fea0567df0da72872
font_02_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 16648 bytes
SHA-256: 0ace32668fd768c9d54ae00994ac96f64a6f353c92424dd5423152add1eaea4f

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