Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a7b044b7874cfb…

MALICIOUS

PDF

97.7 KB Created: 2021-06-27 02:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8765985f9b2c2661959432b1d3bd99b1 SHA-1: a0db6f8b7b44821efb0abfc568393c8f15d4ee53 SHA-256: 47a7b044b7874cfb4dfbb3ad2249f3680ebebaa81886ab3eb3a1b03c41b4540d
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 functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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 https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/11d6d74ecdcf95bd7f84d71c9308b80f/rovetiduwabi.pdf In PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210531015504.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/879c9b5e9bf2d675808cbdf10ac06711/41944646304.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16206542219488.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e934c7ad6870254fd4ee2f27ae3c4043/63378874393.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/79b5555fcf75e2012731dc6236274d28/wusatuvuzom.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/wajezexo.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/49731750462.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/joduvawirufovaguzuril.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/71907268984.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/zatodigef.pdfIn PDF document text
    • https://primer-spb.ru/files/files/tedomubulimelaxa.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607755504102f---sofinakobejikew.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf5620201---37058825904.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/cf276ac0921e53ffcb08b7f3e4deae49/52097443732.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a4714c753b7ec92932da2c93cafe39f8/26733036518.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160775d67d3496---58407759536.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db342f3d07---kodakuwonaweturigefen.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/pexodureresogesawowojob.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d8531eb92b4065c8df5f85b7aeaee2ac/rorosifavuzekozi.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/50405681504.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/48045536742.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/butabejufasefukomoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=blue+indian+ringneck+parrot+pricePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 17572 bytes
SHA-256: 7397a35eaa29fbfabe5e385e8854dc47a486deb88cb966b71fc9bdb2097370b2
font_01_sfnt_off00012f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 10764 bytes
SHA-256: e560fdd79854e05c05065e86b2a9c76dd575d20d20f52960a76bf90e3c8376ba
font_02_sfnt_off000147da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DA 17132 bytes
SHA-256: 47c815316ab605680b99980dd6497059e59680d3471fe84b8a3b1f0965e30970
font_03_sfnt_off0001612d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1612D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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