Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e4783ad7399b75…

MALICIOUS

PDF

84.5 KB Created: 2021-09-17 02:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03900eb932b48c03e967c262f98cb335 SHA-1: 95f7b3434745cf40d88266a25083501bc7cf0895 SHA-256: 06e4783ad7399b7581b403f8699df7ed746d5859e1a456397922a4915a6e936d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests the document's purpose is to trick the user into believing they need a password for an archive, a common tactic to hide malware. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=how+to+open+rar+file+without+password+in+android PDF link annotation
    • https://gamepinleri.net/calisma2/files/uploads/14562613847.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/71561371350.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/78215213153.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/79928669603.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/kuzuku.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/73098729454.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412fd57ed00---22716748097.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/fupejovenilato.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/wenovipozaxakebigisugidib.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/61137494396.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/jipukexufagitenarogis.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/xuzinaxuwewubuduleki.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/zafurafebirobitaso.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/25335478780.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/devivajepokizarixa.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/62758349031.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///21141059080.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/febomokumokitopobimewo.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/35756658905.pdfIn PDF document text
    • http://sb-78.ru/files/file/34652952642.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/fewakufu.pdfIn PDF document text
    • http://ave-france.com/pics/files/nexiwitime.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/m34jnmgvuf6pqio03ojnt4d7ga/bewajewita.pdfIn PDF document text
    • https://maisonforville.be/documents/file/rexedolobavudi.pdfIn PDF document text
    • 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_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 18496 bytes
SHA-256: eb47e655474af157e2b64fb976853a39fd81802c433c6cb46ded258549399057
font_02_sfnt_off00012b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B45 10772 bytes
SHA-256: 057d8861005c9f7536e03d1a93b3891b0c2049c102d703b318b203a73f9f4568