Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68977e0c9e6ae1a…

MALICIOUS

PDF

91.3 KB Created: 2021-07-25 20:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 62644c7a44e5942b646820bfb60d157d SHA-1: 2d5c25bc336458de6e9560cbbc7e17cab6fe126c SHA-256: e68977e0c9e6ae1a2fe4b01d9c14afb225bfd7f61aa4a214e2611f453efc4c2f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristics strongly indicate this PDF is malicious, specifically a phishing lure. The document's content, though heavily obfuscated, is identified by the 'SE_SECRET_RECOVERY_LURE' heuristic as requesting sensitive recovery information. The embedded URLs point to compromised WordPress sites, suggesting a distribution mechanism for further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9a50e0936dd11276bd3fc5acc14423ad/vuvosimiged.pdf In PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ebfa9c36fc7cc39e7198b0f31482bea6/jukolebi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ff73b60e3---53467759185.pdfIn PDF document text
    • http://goshaggers.com/clients/2/2c/2ce39afd4341152949bc146f79210d6f/File/63915512977.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/77772196693.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/22012738176.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/96181910d92e62a9a4255154c4130083/4883243410.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/4rliv0be24dnboerv03t6t0uc7/nemukabozaxagofijozumag.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/gulokodufobewigavafusogot.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89e3340ae7---famadupotosajig.pdfIn PDF document text
    • https://biocoils.com/img/file/lenomane.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/94951446887.pdfIn PDF document text
    • http://sartor.ru/upload/files/mejimorupegeradomaz.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160834a7ee4dba---dogumenekuwegekedawamak.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/8bafb8c5664f30a089a5d7e5a6457343/18622223563.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/jovapadulasab.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608616feb1043---sunezu.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/15100243130.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/jqjo140h7fq3pahb70hopno181/74006583199.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e0c8ea519af---fubapusiripoxolema.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/90038389516.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/fidetenanivabi.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/96058285037.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/ginodanuzenopusotezazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=toggle+sprint+1.8.9+downloadPDF 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_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 17904 bytes
SHA-256: d2834e45c850540d3ce9cc142de1f928e6bb2fd6a00c2d216727958fce111c4e
font_02_sfnt_off00012bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDD 11112 bytes
SHA-256: 99372d22ee0b02d7da4fb007ef0ea09de86b4d85ce8fbc12f90fe3070fbe71d3
font_03_sfnt_off000145de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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