Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f8bbd88d89a9be…

MALICIOUS

PDF

78.0 KB Created: 2021-04-07 00:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b7a9a10b6ebf3f68e77ef2bb70c006 SHA-1: 766984bfcaa3f719f9429ba1ab09d24f15544ea5 SHA-256: d4f8bbd88d89a9bedd760f6b9f85a81503616d4ad1cc17b3ede8efa7a76202e6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result for a specific book, aiming to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the overall detection suggest a common phishing or downloader pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=adultery+paulo+coelho+pdf+romana
    • http://myimperfectmomlife.com/23227662984asdmw.pdf
    • https://cdn.sqhk.co/rolizemixij/OticEti/easy_chocolate_pie_recipe_no_bake.pdf
    • http://securityverifiedservices.com/refurolufelomadowizoxozenui3j.pdf
    • https://cdn-cms.f-static.net/uploads/4416305/normal_6026ee097693c.pdf
    • https://cdn.sqhk.co/govizanorev/hhzjdjf/66073114036.pdf
    • https://cdn.sqhk.co/ripalufix/hhe7Ohe/euro_truck_simulator_2_argentina_descargar.pdf
    • http://trenketo.buzz/93368491266nquti.pdf
    • http://rm-swis-mine.com/what_is_cultural_historical_theory476i0.pdf
    • https://cdn-cms.f-static.net/uploads/4406169/normal_60664286a3b5c.pdf
    • http://hangookoil.ru/aieee_2011_question_paper_with_solutions6ft0h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pexodugosa/48739892509.pdf
    • https://s3.amazonaws.com/muxozuvalubi/69711673836.pdf
    • http://bevonox.epizy.com/basic_oracle_sql_interview_questions_and_answers.pdf
    • http://zaveravezujob.epizy.com/actrapid_penfill_information.pdf
    • http://sukidagijonola.rf.gd/95142806789.pdf
    • http://rolugume.rf.gd/how_to_actually_stop_smoking.pdf
    • https://s3.amazonaws.com/datarofapakil/68400334063.pdf
    • https://s3.amazonaws.com/wavunot/11573575155.pdf
    • https://uploads.strikinglycdn.com/files/24a49276-169e-41c4-a25c-46ea4fc094db/vakukuworugip.pdf
    • https://uploads.strikinglycdn.com/files/d5fa4239-e57e-434f-931e-1efc15ec32eb/how_long_to_cook_chicken_wings_in_masterbuilt_electric_smoker.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f21b.bin
9562a348d00101dc3e1821a0276e97e450043bc26592e7a0d5666869a92aecd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 5308 bytes
font_01_sfnt_off0001040d.bin
0c818973899a3c2a7d90f668b22edb267a52f8e9439ce113b7a20b6adad788ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 10900 bytes