Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f4e39fee71c73…

MALICIOUS

PDF

147.8 KB Created: 2021-06-29 22:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f6d3241d9529ca41fb4836b057ca348a SHA-1: c69793a3e77f6629b757affb504bb4a0f49ca960 SHA-256: ee7f4e39fee71c73a8995012e42cc6f58da05ea599dd49f223c174451b3de3c5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160738b21c9d54---13989483784.pdf In PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/b9f6ee2830888839c58c2282f31d2bfd/duxigivuxexufutukuxak.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/373dc465be5197bdeb994c19c1c1fcdf/goturix.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b2dd8cc7---97946031198.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a8e201e01108252594d385d7069fe17f/16372054845.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160765e363d2a3---68841086692.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/98820352303.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5967a0a63---73306685754.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/9260542011.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/a0e7cca9db6aba29a90f9f061794941e/gesit.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ffe92d37da2946e1b6356c0ca26db416/buvebipunotavi.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607199be16787---jedapajapogepezajejev.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a27a73efd12---vuledigupewapelosewup.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/9adbae5941561a90baa3e8dacbc758d9/39901142149.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/d66370b41e6fbc91a1eb5c7eda4e2186/wusolafif.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/vejatajodebozajuz.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5474eeab0d---gagutupebu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160767f3eafabd---95170305624.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///lizuzusuk.pdfIn PDF document text
    • http://kco.su/userfiles/file/koxelajizuk.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8dcde2b6b---24162411866.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8570ed40---71631148107.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/41946733146.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2c5a43c4f0aa42045dfa5eadbe8f3660/43809220914.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a92482309bb---dusuwuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=us+president+2020+resultsPDF 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_off0001e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC85 10452 bytes
SHA-256: 4cb9cc6d831ce232d8e1c6e3f33e25c8428f8757c25f5c8057e67245198bb07a
font_02_sfnt_off00021459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21459 17372 bytes
SHA-256: 61862e4d1393823907556a6b97720ee8aee8f33d5ce619af9223c717a45fe056