Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bad4dd343a3c61e…

MALICIOUS

PDF

143.2 KB Created: 2021-06-26 12:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2aeaa23fb60356ad8524afc652362819 SHA-1: b4d544a5f455366848706deffadf361989cd86a1 SHA-256: 2bad4dd343a3c61e1d3232c56d8169444b8752845ff97506f91bc882a919ccf8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://nomylo.ru/uplcv?utm_term=matrix+meaning+in+maths PDF link annotation
    • https://angkortaxiservice.com/userfiles/file/tarobefefarosu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608756610140b---netopagimelusumefaponoz.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775b5499e5b---88364191296.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fa9042d3ac16d59e6a15538d4be04a18/mijosafotowugovelutiworo.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/jafirosi.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/gijukowamibu.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754ef39ce76---pelifoxiderijoburat.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/17ae2e9468e58a4893e90274ee23f07e/refibanexiridumu.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097084673549---83487948079.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160791076d462d---86673327242.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/33370429652.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5fb08308b549fde0c5e05cc5e8d6729b/fomanifi.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092637ecc728---74954167225.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f6362ece84807f10cdb3615e15d583d9/badapufixajavonumaguj.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ee227da47ad5b0617e2b056aa465eb8d/toduzuxij.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a57500149bed2660b763847fb18e9b24/21617499962.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ae0067ea1---67952704932.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d072a7e7a92---nemarofusijin.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21e5b314a0---bumune.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bec26fa39101a46229b220777d952196/60648279796.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608484089030d---30643010587.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d290b9c367---xiriwilopejatebosizog.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210507083530_24227842.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe4b05ca24---5230616053.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEE1 22132 bytes
SHA-256: fea386e89c7f7db3b61e17acd687212e52a85462b2c381d2606d80d7d2cdd247
font_01_sfnt_off0001e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8AE 10484 bytes
SHA-256: 1d64523018e48f623f6ce3a789a9edffab937b16cb3834fb7b7c146161b4f840
font_02_sfnt_off00020055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00021866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21866 16440 bytes
SHA-256: 810f58653050c036fae0cc579cc19fd6b3731f5af728eef0955e22bc8ef8659e

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