Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40c0c4ed120b7fb…

MALICIOUS

PDF

85.7 KB Created: 2021-09-10 03:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 243fc02d6d67c4bc22c01e6fc2e95eaf SHA-1: 3ed6e901da6ba8d6cd54b77a4389c9b794012323 SHA-256: e40c0c4ed120b7fba79e581d627680ab90127754693b3c83ca43835b4444a670
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution attempt. It contains numerous external URLs, suggesting it's designed to redirect users to malicious sites. The PDF structure and embedded URIs point towards a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=hamster+village+game PDF link annotation
    • https://chptravel.ir/data/file/serikunagekogivivanojus.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/nafalakisaw.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/sukivibulajexa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f49ba0881a---gikozekutozemajixiwe.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/wasejomajudowuluxebox.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85b91160a---lotiwi.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/58935685008.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/rupasakekiv.pdfIn PDF document text
    • http://sayarbobinaj.com/file/50846901004.pdfIn PDF document text
    • http://sparkpro.lv/content/file/tavizetedeji.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/7396338476.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60055146750.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/jiwinikajosoxuzokiku.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/fajoguxabo.pdfIn PDF document text
    • http://sswjeans.com/files/bitijifimajamepodesaxi.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210901105243_v0hhie.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/55099099504.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/nipazefom.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/58760596299.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/81053853341.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/87373213497.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///36357255520.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/55972050415.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/fakili.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 19096 bytes
SHA-256: ed4a60cc7ef59ae24c11f42bd3a144a2ce6e3d18b036f16674f958d0f4ac234d
font_02_sfnt_off000131e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E0 10284 bytes
SHA-256: a0d7dd9bf762e3fe8f3146e8c7eb19143d2cebc1094c8c20ca1f2d371556ce05

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