Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f910e61f3506a74…

MALICIOUS

PDF

92.7 KB Created: 2021-06-09 02:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f40af2c1ff18f2f82eb6d2574365caef SHA-1: 9328562fe17840446055ca8442f885a03b4c9c2d SHA-256: 5f910e61f3506a7405bca10cb1a8e8bc447a3b3c8d1aab9eaabdf5c8c10e4cfc
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crysiq.ru/uplcv?utm_term=vray+3.6+for+sketchup+download PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/337df31e96ec78d220c2285269e924e8/gamekuxolokubi.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/lirnhh1ml2p49js6kk8dkmdh72/zelugevejobirupadim.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f1976850---sisaxobizeduwofu.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/4e9qj7ae5le0jvjqmgoabr1qtp/90778796013.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dd8c931f6---5242139330.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/zuxoxoba.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/63434814569.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4f246b56767f4b46eaf57a9df9f8206a/2708901549.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/2vlpm6psjqu609ngsld73pvvj1/78963968618.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/821hj96p4i89v5uj3hb92or492/58635863945.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c5a06e5e9f84b2af106075fa474c348f/50163929625.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ad16e9b7203---zizimo.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/85416375390.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef63c8da88---7681174215.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/e8a8c4fe8cb895e89f5b8752bba0dd22/xarimuvaribapixuxewapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 6832 bytes
SHA-256: 8ffa0a7012bdbc979f05a63d7f75e73875829669dce55cdcbc4c4d8d4cc6eb8f
font_01_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 5816 bytes
SHA-256: b0b65443202846b1ea860fce88f0665a1d9c4b95d85a05ee9056ba4d9f3de0a6
font_02_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 4708 bytes
SHA-256: 907f72630e36d42f87ed7531196800e3c748c413ce9b341f447c0e2ae5cec419
font_03_sfnt_off00011941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 23032 bytes
SHA-256: 0f364a6da78333c1c52c02ce03b0f641750eefd84e13d6c616509a549dcfb1f5
font_04_sfnt_off00014d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D45 16256 bytes
SHA-256: c18336351d59dff1947b31bf2b206fbc1a6e82e065b904ff5c3a7baefcc66101

Open this report in the interactive analyzer, or submit your own file for analysis.