Malicious PDF — malware analysis report

Static analysis result for SHA-256 92796a518a931f0e…

MALICIOUS

PDF

68.2 KB Created: 2021-10-03 02:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3388585a801e6c1ca138c5278aff0bcf SHA-1: 1f1b26fc426b39fe4a3bb3f6173492d601d60cc7 SHA-256: 92796a518a931f0e7ae19998ab459509216a1c17c097ac5ad3d3fffd35207fd0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including a small file size and a visual appearance suggesting a screenshot, designed to entice clicks on embedded links. Heuristics indicate it's part of a link farm hosted on disposable or compromised domains, aiming to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns strongly suggest it's a component of a phishing campaign, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 68 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 https://garglob.ru/uplcv?utm_term=novels+by+indian+authors+pdf PDF link annotation
    • http://candleelectricals.com/uploaded_files/userfiles/files/mirugumedisupij.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/duwexujudutaxaxedu.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/sugujata.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/gamal.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135238958ed8---84124698583.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/peluvexalepiv.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/36267218635.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/3537671033.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/31346557733.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/bodeduxuz.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161515591cb31d---26249703621.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/sakuxosofebexazawokexudaz.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161580a3bdafa4---lasesatufuniga.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/47985432323.pdfIn PDF document text
    • http://manenshop.com/upload/files/veduter.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/niwid.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-13/20210913195557998596.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109210119094774.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/88083603624.pdfIn PDF document text
    • http://profiklub.sanswiss.cz/files/file/bakideziwe.pdfIn PDF document text
    • https://grnca.org/img/files/files/buloga.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_off0000ae6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67C 14300 bytes
SHA-256: a7695eb96f4df187c555cc705c919e4ecc33a829a773cd0f6279c4be5ae76ac2
font_02_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 10992 bytes
SHA-256: 2cdcf680c06209fb0fceec5de397f989e4ca0c3e3bdcd04de93e6821e4dc148e

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