Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d4476c5210ead5…

MALICIOUS

PDF

87.5 KB Created: 2021-04-03 20:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fe23e6d0ad9ef74e165896505668301d SHA-1: 559cc3056f5ae8828efb320e27441e5bb555e48a SHA-256: e0d4476c5210ead514deffa7a8d4f8290b94e904541771b6f433be59044e7dbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=sans+twenty+critical+security+controls+for+effective+cyber+defense PDF link annotation
    • http://xofebuledat.scienceontheweb.net/latitude_3400_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_606768999a9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_6061e3c4e2686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_60445d3d437cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483586/normal_6025c12d511a9.pdfIn PDF document text
    • http://matizaw.mywebcommunity.org/arcgis_10_arcmap_tutorial.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/editing_documents_online.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/zulesewomadag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_5fd9897057aa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7d774c08-2985-4571-b318-c74588a3bf44.filesusr.com/ugd/4c76bf_cbd1aa3b811d48b3a7db00ebbbe0457a.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_61e815f2b7734d6593800b447863b2ec.pdf?index=trueIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_50cd4a655e2c480a8bb844d26df37616.pdf?index=trueIn PDF document text
    • http://gudugapapilile.atwebpages.com/40454863766.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/73908162195.pdfIn PDF document text
    • http://zotubune.myartsonline.com/accuair_e-level_touchpad_controller_manual.pdfIn PDF document text
    • http://pubegidunelu.epizy.com/brandywine_boutique_bbb.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_8fd85cbd38e94406921d14460f7200fb.pdf?index=trueIn PDF document text
    • http://dupizorof.rf.gd/79132771544.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://scripts.sil.org/OFLIn 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_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 5512 bytes
SHA-256: b6c3e6734b55293562cc592ae2f10f54185ca35a123b8630b1ff2b80101f7fc9
font_01_sfnt_off00011647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11647 10616 bytes
SHA-256: 7178af3290a3396bf8ae445e5ab849464394253551b41dab9e2c172daa1a5023
font_02_sfnt_off00013aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15