Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd38b6dc7a9632a3…

MALICIOUS

PDF

84.2 KB Created: 2021-06-26 05:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f5e7c2f16d720a77b825e1074407b3aa SHA-1: c336581739d1c386aefb605a824612ee3d54d319 SHA-256: dd38b6dc7a9632a33b085a56bd624a390286bbf5c73f64ccfdfa6574d9a3b784
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and link farm characteristics indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/zurusuginaduwuwijovo.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9541f0a14b63f6dae49a4e45f51ac83b/bomigozuvidajix.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/gemafejuvebalutuvokobadew.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/3bee2fa58bd6aecddd98b5938cb967eb/renunitukusonikibeta.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/giwinigoderixuwoton.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/juturomalolexisimotu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/tornjgrlbp5sh90bnggphne4q3/madolalanonolalafiwotig.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/85723870297.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/vutisebivi.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/35939447951.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9b6ad93d4---xodevomakekinam.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607030d3f17e4---sapalenotomemut.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ec156765830f4714612a74af61c53de2/tezojuzaropokowolujazu.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/zaxegupegilobinika.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/biwisamugimado.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/pijoz.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/00h4ve425reqr39vpur759neh0/gapojip.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/80778587658.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/besulogunazenogisibarovuj.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8b56409a0---xikoridozusagijejumof.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cc9df39aa---56084200198.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/kevumojijuvaxutijodew.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ec0ecb51c341a329f454eedd200f43ad/16557220802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sonic+3+complete+unblockedPDF 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_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 17192 bytes
SHA-256: aac6fe1d2f3c647612b9a808354ddc9d22086597efb9ac7da74f09986d0708f0
font_01_sfnt_off000112e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E5 10824 bytes
SHA-256: de8b596e4a62141c160d1bd676c9d9536db1dd9a35b0fc436453dff8a6c67ee8
font_02_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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