Malicious PDF — malware analysis report

Static analysis result for SHA-256 048269138b18f1ee…

MALICIOUS

PDF

75.6 KB Created: 2021-08-29 17:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 922335ba734c0ff42aa9b655be7b1513 SHA-1: 8e1492e36ab3dbcce1c11b1db52acdb8b228ebbe SHA-256: 048269138b18f1ee08d6ed310d5e1c20bc486cc042717d1af204741aadc45201
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of multiple external URIs and compromised CMS upload links indicates a high likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=2013+chevrolet+avalanche+owners+manual PDF link annotation
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/13806056133.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/41201823916.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72990217020.pdfIn PDF document text
    • http://abpaluso.com/upload/file/53869454647.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9e2a01f49b8658682d329429fa1614fd/bonif.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c9b02853b---vaxozifolesa.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/43318977165.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/12296508498.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b46820bfccc21d70091c9ee1897732c8/99736594101.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b5fcbcebf---wanewinikafabivefuwag.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ad03beae---bopujadorinigonolupel.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/94402764757.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf86618a6---25084248379.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f3d916d5c---vurenumobutetana.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ddf7d830---molumugixazesoperemiwuv.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont//file/50651541860.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d16a79a641---vigaremox.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/24604596096.pdfIn PDF document text
    • https://hirurgija.me//files/pafimotatinikitoju.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e0a0e1ca5---92046605306.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/22696125304.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9db17db96c1f591f211b588f9000c73f/tuwezav.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/13185541687.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/24267513148.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/xaxodalatupedokise.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_off0000c4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E4 16356 bytes
SHA-256: ed0cee684a44d7a0bdc0e98ae39c4c13325f9f605671af3939990a944a37110a
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 11024 bytes
SHA-256: 3d959f8664f36f2223c2abb4188d60031e2722b2f205e63ed3ab2d823702f384

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