Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6e4c4132f9e34c…

MALICIOUS

PDF

84.5 KB Created: 2021-08-20 12:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2cc5e1d8cbbcfc8c843231bd144938aa SHA-1: e3ed8a62a24de13571df855756d3a9b609b03472 SHA-256: ed6e4c4132f9e34c83e023b12b1fac18c0c883b52c8a3810ea5d927324c28fd2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and embedded links strongly indicate an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2fd2a03327b56c4bb11342eec983e81a/64559889254.pdf In PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/selugexopez.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/sajuxevagolobafuba.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/larerenenitez.pdfIn PDF document text
    • http://secretinvitation.net/images/files/83882467207.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ceec52f14---94194239386.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/xenofezixenaduwomofilo.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/paron.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/wawabuxe.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba38a8f47a---58533774639.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7nap96gb7ggk9u4a8d6kt9b9uj/84856608235.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/2621161095.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/e46a5be8377a70fb1e92cdc89b0ea210/xexorib.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9dccc586---21484352114.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b013842db32---29770828041.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/lopulufe.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/zofefazanepigokisojika.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/260455359053.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/c4d28148b4adeb1547faa9e0642f934a/jazepusogovarato.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24904770400.pdfIn PDF document text
    • http://fields-on-earth.com/duzatifagumiwudisetekijum.pdfIn PDF document text
    • http://lucann.com/Upload/file/31742881342.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/5091163657.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/2dbf348443476f2e7367aca9a8accdac/74865864012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+approve+tagged+photos+on+instagramPDF 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_off0000e364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 17724 bytes
SHA-256: 3a635b1f2470036155a72ba142e9665a8dfdc5970e4b961f670b0ae615b41e2f
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 10936 bytes
SHA-256: 9476562d762f37802212c9e8f770ba4f9d8cceae0700e0e4be1ddc2e72ba162f
font_02_sfnt_off00012aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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