Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b3b4de9defa918…

MALICIOUS

PDF

91.6 KB Created: 2021-07-08 07:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 00bb1e5c6606268a133b7e440c0d91b3 SHA-1: f3ed5c6707f861b6711bd98a7e343e1c4f22909d SHA-256: 96b3b4de9defa918ff1b013187f455576f0bd1aeb60ca65492572e29f6879399
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous distinct hosts, many of which are compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://centreforeffectivecoaching.com/media/file/54721830398.pdf In PDF document text
    • https://datajournonepal.org/files/59396755648.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/cd6ac715ee34ae1b56e632535f062569/fudeponegaxetaveperazu.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/l8h30f8fg2u18agp5t5lfptsjf/zuxajosoruvigagulugaw.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a0c18f75---vewolowefinizozexujowegu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/knpe9p8q6uu4d0vvkuol8qkbh4/puzofadalasanabip.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/32876654720.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/48a03d17acb9348d4cdfbf53df483ab1/17699285868.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/bunosulomolep.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e5416c13c---metazozosonox.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/diwediwurev.pdfIn PDF document text
    • http://riversreunion.org/clients/8699/File/51551538155.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/zufapevibuzijedajamama.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/tuvosowujesatubinox.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/32661265494.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/33028057276.pdfIn PDF document text
    • http://yanartextil.com/firma/files/92173948536.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/54527335387.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4591f07d2---51811658943.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/40240990483.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96311352e9---20584515147.pdfIn PDF document text
    • http://klpa.net/userData/board/file/14623339843.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/voa0ji22eph7mhpiiotmbov470/sikamogugaxibukekexude.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/jofegedakado.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vreooskevhdftsmar4i2ihe4a7/16292822907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=skyrim+blood+on+the+ice+part+2PDF 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_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 11152 bytes
SHA-256: d07eb3e5fd7091df21d7c4aa5e9315d3aadd2a5714d34907b60a411caf483cdf
font_01_sfnt_off00011cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 17304 bytes
SHA-256: 813624a44a45b06b2982766cd857a7ce14a0cfd4f0238db17586053e475fa050
font_02_sfnt_off0001491f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1