Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8dc1952b853725…

MALICIOUS

PDF

71.1 KB Created: 2021-09-13 00:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60e12857a00ecf86f041c12aa7c5a529 SHA-1: bfa945bd6ed9b6835b74c74a074ff615310a27cf SHA-256: eb8dc1952b8537251386df406503b9f9ec4cbaa6df2e388959cdbfc5795c6b4a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a deceptive download button, suggesting it is part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=avatar+telugu+full+movie+online PDF link annotation
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6d6d15467---88281296861.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/keriwofapiwerikageso.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613522875c4c6---buxufabakadulidubojejixig.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/junafetunumuful.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-6/20210906015111671753.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/ramiralikabowaxe.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/japakuvadovefet.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/didutoloserogekewomodaf.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/29356619839.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/minumojedib.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/fewigowo.pdfIn PDF document text
    • http://nature-revive.org/files/file/90847054657.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6ec11b930---vufifagafamejukonipijix.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/86048091014.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/wevusadedededilujoxus.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/nixosiledemejemopa.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f9c7257a1---kebududivut.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/juzopuv.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ec3aafb04cf83f9673600ccecd050b6a/limuzikevuxen.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/95434599771.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138d3ee3125b---disidur.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/nikimowaweturedot.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_off0000b4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 16116 bytes
SHA-256: 5a06e8061c87fc05619893538f298e27949179d73e90f21edf827c9eca347c37
font_02_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 10536 bytes
SHA-256: 5030134762b7b80cfeacd64180e56473863057a928e854fa265a9a4373679489

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