Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2a3c1063c1faff…

MALICIOUS

PDF

90.5 KB Created: 2021-07-09 14:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8f6c057c691229c08eacc62da095520a SHA-1: 67bc668c7e4bbb2a5f44ab2e0295e4c694ff276c SHA-256: 2f2a3c1063c1faffe6337312fd18ef2c94049a1f61a75f2499f7cb9b39b1ff30
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160895ef71bbad---liximilisusowin.pdf In PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/towupopipefenezijek.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb80bda1c2---wigalol.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31272efa17---35890082225.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/623ceb7af51f59c87d902342397ec817/zewemigidazaraga.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affabbbd052---gufufaxikol.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a47e5182a---pogikunuwiwilosew.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07d5ada969---28403448180.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/tefibajuzizijejopeg.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/72912593661.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/linada.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/bofezalimowekubadetonolu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088796149640---45861070272.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16086046376f0a---19125671541.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/072056025203.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/cln7npfjoi5om299bg3gfpqod3/90853212793.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/dkev2b9fpm187oevptqlj34kj1/4656583094.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7cbd92e02---bofeluzorebukuv.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/827a1473d199580c3592fb6fa0bbcda3/fatevevamowarete.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/xatexaxosunonojejud.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160769229cebbc---jejuwofozexajo.pdfIn PDF document text
    • https://avvocatoboretti.com/file/zivapatut.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/nurigujumugetusudumumagam.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/tubimuvogefiwepupenarufev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dark+brown+hair+with+pinkPDF 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_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 10324 bytes
SHA-256: 676814af37cd1b07457b0f4a1f6f200938df61f8044c72b169d3361824cdd2de
font_01_sfnt_off00011688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11688 17572 bytes
SHA-256: 8e6a067ea52fb5d6719ffce9353f230a9625aaafc7b5454fa40205c5fe4b832c
font_02_sfnt_off00014494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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