Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a38672263056603…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 20:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 587e3ddb010b81fc42698b2316a5cee2 SHA-1: ea246187d3bda3be1dd07144cc00958d634d546c SHA-256: 6a386722630566034c81e2f2c9eb2c826e0864456d447394675a53b5b96bee69
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555 Credentials from Password Stores

This PDF document is classified as malicious and exhibits characteristics of a phishing lure. It contains multiple links to potentially compromised WordPress sites, suggesting an attempt to host malicious content. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely prompts users for sensitive recovery secrets or passwords. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic further suggests it may be part of a multi-stage attack involving password-protected archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/c266f480401c92a52b8dfffb79c3bac0/wefomabul.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160760087c1ea8---xobukonifub.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b2b6e6047---77792734002.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cc558023e0352abf62afd19895b6714e/64584720190.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/22534377596.pdf
    • http://karate-talence.com/newsite/userfiles/files/3564207373.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/06e91df1057bf17025151d1fb4b26736/gasesiporexo.pdf
    • http://aep-tc.com/cache/fck_files/file/47703348917.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee73c154f---50300076776.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab75590e6---40924109413.pdf
    • http://happyhanool.com/ckupload/files/46759914735.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f603379a---48272023588.pdf
    • http://innotack.com/userfiles/files/delefezuketinokegak.pdf
    • https://soechi.net/userfiles/file/60931044030.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1367870f---47169003971.pdf
    • http://m2m2design.com/userfiles/vanukafadanotusibotesogan.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95b2a390d7---58331051373.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079985863ab5---33752413906.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609142000d48d---tabamosuzazenoli.pdf
    • http://momsystem.ru/public/file/38736476075.pdf
    • https://kidneystonetreatment.in/userfiles/files/rojone.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/j5pah5j7hq7nc81m5llm67tdq5/takunetakodedumiweni.pdf
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/mekiwewi.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/86660249967.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+find+stored+passwords+on+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e1.bin
b40df47af134ed4c70143c5c38f2ca5ecb06b4902c7bb8a95f2844a92f43971e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 16820 bytes
font_01_sfnt_off000113de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 16792 bytes
font_02_sfnt_off00012bf5.bin
6790e03b8a086843b476a7272b5d896b2796f1036b7cb4449e1f620b6acb262b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 10520 bytes