Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b5ae9c003f2ae0…

MALICIOUS

PDF

115.1 KB Created: 2021-07-08 07:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8f3bcf326617588ae2846af66864854 SHA-1: 4eb9ce97933348ee12b466a83a64318e768d2611 SHA-256: e2b5ae9c003f2ae05c943211109600c9a387af6395940d3ae54335d6851f69a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm that redirects through multiple compromised WordPress sites, likely to deliver a secondary payload or phish for credentials. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to exploit vulnerabilities or facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16089bba88a18a---21248226008.pdf
    • https://thucphamtruongxanh.com/Upload/files/44408852745.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c95e2bc69f---46447068921.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078cc27d170e---56436026590.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608f38c192f4f---62857181380.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/dfc0ae6e911139b6f8699f17ab58c12e/92660474217.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d1f2a2676---besojonovog.pdf
    • https://fenicia.uy/fenicia.com.uy/uploads/files/67877776391.pdf
    • http://sbs-group.co/userfiles/files/59277000044.pdf
    • http://mintaialuminum.com/d/files/24999033387.pdf
    • https://planet-for-events.de/userfiles/file/mawumasalilimuvipemapu.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ocq332qbmo51mdai6dlqileqji/tuzejunazavidutiwudajurar.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606e537bea85a---nepuki.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/6dddf77d7bbcffc41f22e8bd9eeb5d63/saragarumisanusazudamime.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/f9d9187e8d970e3c40974d924ca56243/fawar.pdf
    • http://zlato-invest.cz/upload/files/76402127156.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f240a564fc---gutosuxixuwipoxipaxib.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/d53c57f369fbcc56c825cd42321110fb/zudotowu.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160946b7cd51b4---37311647685.pdf
    • http://circolonauticofavignana.it/userfiles/files/zuzesopinevovekibawegik.pdf
    • http://penzionklara.cz/userfiles/file/tosoraxufanijevon.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609de090038ca---28725237973.pdf
    • https://pioneerlift.com/upfiles/editor/files/18384636295.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/a5godm75sqffj71lamvc8t0f93/xifasot.pdf
    • http://abnicum.com/files/file/vasifisiwodetenumejox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tiger+sleeping+images
    • 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_off000163dc.bin
2562f7a522d474a78409b4d568481f3b8b8f88407e2f7ad9a9852246c15a5136
pdf-font-stream PDF embedded font (sfnt) at offset 0x163DC 16860 bytes
font_01_sfnt_off00018f93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18F93 16792 bytes
font_02_sfnt_off0001a7aa.bin
07a63c969ad2e2bb23138fde749ea88f44ab7dcd7a618e803d682401360bd6f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7AA 10340 bytes