Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46dfe33015a8e1c…

MALICIOUS

PDF

74.3 KB Created: 2021-03-20 13:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5a73f26a8822d1b2f15607d10181cc2c SHA-1: 78163f430c93f284d637d9634118a580394b1ac0 SHA-256: e46dfe33015a8e1cb0b0b8a2c08ea7b02c38571e49318bffb424444f09ca186c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion pointing to disposable hosting, indicating a link farm for SEO manipulation. One of the embedded URLs, 'https://bologen.ru/wix?keyword=8+ball+cash+and+coins+generator', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=8+ball+cash+and+coins+generator PDF link annotation
    • http://nujevujem.22web.org/how_to_get_probability_from.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/91397810-cb5d-4fd7-830c-97e87993612e/what_is_the_difference_between_a_program_and_a_project_in_the_field_of_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571c8ea0-bcef-48b2-ad2c-446eb9b20f26/geruromixafubiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27c17f5-f26b-445a-b229-83c955b746e3/cochrane_asset_pricing_coursera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec818145-9727-408f-9250-7c8bffe5cba3/35451586434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178e0fd6-c1f6-435a-ab2b-43f116a5e0b0/advanced_python_3_code_examples.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/structural_family_therapy_case_examples.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_ded8a5c756e545eeae153da930cca89e.pdf?index=trueIn PDF document text
    • http://natetakadax.epizy.com/momagibejugenixadokixalix.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_5096c650891047338cb24b98a85bd452.pdf?index=trueIn PDF document text
    • http://muxobuduxude.epizy.com/how_to_clean_vicks_humidifier_v3100.pdfIn PDF document text
    • http://nuvitaros.epizy.com/besiege_free_mega.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/salary_payment_slip_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe004ab-5ef5-4d89-9875-515047ecf18a/sagafumip.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_5f8726b8a73648da9d389d87d42c3ac6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb46eee-ed44-4c04-a2a9-9f68a38fed1c/38326699622.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_bfc5eeb63ba14b4ebb219cb4b99df893.pdf?index=trueIn PDF document text
    • http://divupovive.epizy.com/hamlets_to_be_or_not_to_be_speech_analysis.pdfIn PDF document text
    • http://majuzudotalu.epizy.com/mavaguvigomojejefovil.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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 5440 bytes
SHA-256: 7c84284ed5a3092e5165d7ad376bb905be1343d3be2d226ecb7946cf49be8d50
font_01_sfnt_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 11220 bytes
SHA-256: 4e3f724d3878e87e134d6e1b67ea398a84cf6662dcedf3ad9f8009f94f8fc2be