Malicious PDF — malware analysis report

Static analysis result for SHA-256 115030ce45c5ec89…

MALICIOUS

PDF

79.0 KB Created: 2021-04-29 06:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7e3f497b1fee382e4f7864ce605e3f9 SHA-1: 6ec0340186fe44b112bcaaa4642eef604470ae4c SHA-256: 115030ce45c5ec89d1346b86c39de0080b31c4a253b824d1b621bdb2a79e0439
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=magic+bullet+blender+cups PDF link annotation
    • https://cdn.sqhk.co/luwesefizi/Dhiuvgf/jajibenodiwufizifeduvix.pdfIn PDF document text
    • http://firstsecu-paypal.com/how_to_reset_weight_scalex5wzo.pdfIn PDF document text
    • https://cdn.sqhk.co/mimofeto/ihchbdY/8992120254.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/e_waste_disposal_methods.pdfIn PDF document text
    • http://itslm.fun/rutekixabucexl4.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/6sgingd/wofowaw.pdfIn PDF document text
    • https://cdn.sqhk.co/vumatoxikom/L62jchd/airline_manager_4_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/cjbhtCQ/flip_skater_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/jgelzge/rewewaw.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/rcZijjd/52715173130.pdfIn PDF document text
    • http://lozhobelir.space/jivugikogisigugivamivasaxup8.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/business_communication_process_and_product_guffey.pdfIn PDF document text
    • http://tamakar.xyz/avic_d3_firmware_update6jtrd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_edd8250efe5547aa8cd27e89e079b336.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d51967d-da34-43c6-867c-0afc793f3abe/40738133316.pdfIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_fa9930892c754f068e1b17f45c41bde9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0081458-4b2d-423a-84f8-7f6b8b5b9938/82298410664.pdfIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_39730a705f1641428d2a63fd0d35acfd.pdf?index=trueIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_9e5ff274363e4bf3b697f4629b1d4829.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52996cb5-3d88-484e-aae8-f840137ca52a/old_mans_war_download.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/rurivovuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e43e6e-8903-4ee1-8ca3-4a277770d626/how_to_bypass_my_viper_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7d8d3d-0550-4f71-a088-fd92b83eb045/best_calligraphy_learning_book.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 5384 bytes
SHA-256: b859c9ea79c5c39093e7a6fda1d787cb185fc0755e9bb946a4b8fe1a2eae1a64
font_01_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 11400 bytes
SHA-256: f481a2ab08047ff765f39bf26b59864150560fbbbb146e989842921f788b7b09