Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6d12e2e7cda862…

MALICIOUS

PDF

69.6 KB Created: 2021-10-02 12:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a196e29cc289c31f7092b794a3e547f6 SHA-1: ee578f4a51d96aa34fd0388a693169775a0962f7 SHA-256: bc6d12e2e7cda8627c0ec81d81752f9acd5a10a5c1a51bd8f4e1db0f3f1ad9cb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a screenshot image designed to trick users into clicking embedded links, which point to various compromised CMS upload locations and disposable hosting. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect the user to malicious content or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://lev-steklo.ru/userfiles/file/1897064312.pdf In PDF document text
    • https://rzfmuhasebe.com/userfiles/file/78968732337.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/zodoxugikukenabojalinaku.pdfIn PDF document text
    • http://alcantara.cz/data/file/wegimoxatoletedab.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/lejinofilazusaxixen.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/4509925942.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/zesoxenawotunipitupugage.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16151ed10dded8---67963524743.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/94844757521.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6e16r9q6avt462fu26scpnh3v9/zumuwarusifomomupasa.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/ridokelolopakavuwox.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/fifukag.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/18678542432.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/diropokuratibezipetogatu.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/nifuko.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/82657087736.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/bipob.pdfIn PDF document text
    • https://derfo.info/resimler/files/zizuxijidu.pdfIn PDF document text
    • https://adikkedua.com/contents/files/nofeta.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/mupewa.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/kavifafumolorabanuga.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/lafarojuvamatiwevamif.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/20983860664.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/35557486949.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ba3bdaf0d---lilolagifujilidaz.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/65265564231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=can+you+say+what+your+strategy+is+pdfPDF 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_off0000b410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 11060 bytes
SHA-256: 760bc11cf006e39bd7183529d8bbd956d25f60cbd6d2769e6cc57885ea2a7bc0
font_02_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 13904 bytes
SHA-256: f14c798d433451236db18ee372608cea4886dd9badce9dc21708b333259e9ed3

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