Malicious PDF — malware analysis report

Static analysis result for SHA-256 9544e89e0228c320…

MALICIOUS

PDF

82.7 KB Created: 2021-06-10 08:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a230fcf700634933cf254c30782bdede SHA-1: ca7e7951d8015b2788034c3f777a08277f8fe53a SHA-256: 9544e89e0228c3202f6f7647dff60168d6f29249e893531afb181e8bf1481020
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign content, but at least one points to a suspicious domain ('bologen.ru'). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=verilog+syntax+guide PDF link annotation
    • https://xofenozupe.weebly.com/uploads/1/3/4/5/134500057/zizore-tepaduwifanag-vutepumed.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/zuzikoveji_zozukekene.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/5189420.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/afe1b8a3-1268-4586-aa57-301bd26128b0/meet_the_greek_gods_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2f8b9b-7589-4f7d-a637-825d013a05ad/87310450346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42670312-408b-4cb5-9e5d-281da2e3ac86/ciencias_naturales_3_primaria_anaya_pieza_a_pieza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7311cc59-3209-44bb-8809-6e649ff97f16/69484717025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7365c265-0753-4351-b7e3-c76fb3e04148/when_someone_replies_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e64dda-a8dd-4b00-87a7-1cf8747c7e2f/hacksaw_ridge_full_movie_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • http://maxasol.pbworks.com/f/xudubezep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d11a8c-5095-4e03-b95e-4a47423c3089/58812724495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00eaf129-5f6e-49e6-a6b9-ff450a4c8a15/direct_and_indirect_speech_rules_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8150d0cc-7c76-447b-a31f-23fb9076382e/informatics_practices_class_11_notes.pdfIn PDF document text
    • http://finatin.pbworks.com/f/car_x_drift_racing_pc_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424766a4-c60b-48f1-8b50-d5417c2828f8/66807096896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ede88e-6b6d-4731-859f-64bed2cc11e8/jowijamaminapewuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76aa672e-591d-45b5-a41a-49947e5cd09e/fozewufuwagupujukale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5db310b-befd-415a-ac7b-278f2726f1f2/limited_brands_aces_etm_hr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11227e51-4f58-4e73-8efc-89f074343c91/20_000_leagues_under_the_sea_oxford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6962a8f-50bc-45a0-bd26-f4999f4da181/pobutegokotuvewen.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_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 5128 bytes
SHA-256: 3dc3949ab645c685aae45682632b0fa301baa21df7552f7be7dd6989550c31bc
font_01_sfnt_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 11524 bytes
SHA-256: 8388e5592356178e7f4f0f14a57efe71f10668fd5a5f9980a87019d2bf8c4a15

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