Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d0de83bd6bad44…

MALICIOUS

PDF

85.6 KB Created: 2021-07-14 03:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 58d484e55dfde1dd22e6bea0d9c5f862 SHA-1: 0df6a7e44da6239beafb5a4e5e5af6d5ff83db0e SHA-256: 29d0de83bd6bad44fcf00c7cc7b30be02608a8fe09ea1a5bbc38eea266208479
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate it is likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://crewmak.ru/uplcv?utm_term=classify+the+following+sentence PDF link annotation
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/3f9882cdae1125967eb157763e1ba468/27720217414.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/26738351487.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/43381a228dd79f84714fdd6e079ac8dc/malumasonuzevamixalorilar.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0127456001622758000.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/1ppo9tq1ujqnafvehd1kov62e6/73407947209.pdfIn PDF document text
    • http://kochi-mimoto-iin.com/TakamatsuClinic/userfiles/file/15527461540.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f324d0a9ad---buwanuwugon.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c76c482f558---mesuzotuxux.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/kipur.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc70baac6---gokavidogarona.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609144a342793---75850638308.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/soluloxetiniva.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/be3eb81d1abb7317c2a4fbb58445de49/59929329700.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/79654052388.pdfIn PDF document text
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/16141056910.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/58080836636.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/68128483017.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/94119758120.pdfIn PDF document text
    • https://slide-bearing.com/d/files/1257811064.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/vetir.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/70999829127.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/bf74672919403c3b1fc7442310a4bcb4/19920589908.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/hg7747c4mv4jc5j95cv4keeac8/taneravesa.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/12797364013.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/97017785331.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/kifinegutusil.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_off0000e98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 10744 bytes
SHA-256: 554efc9472a1a661224c0bf2cae867a556be9dbf72c72263f35278bf019bd681
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 17304 bytes
SHA-256: 6fb5d38ea62b8016d089c0d6ffec51aff0ec8746b7b72cfb3e1abb6627c0a587
font_02_sfnt_off00012f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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