Malicious PDF — malware analysis report

Static analysis result for SHA-256 822add1ccd763eda…

MALICIOUS

PDF

82.5 KB Created: 2021-03-17 22:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c419c9a0898450090ae80ae81005ba05 SHA-1: dbef647c0a585d6d569c3a82d259776f0fe51c80 SHA-256: 822add1ccd763eda0b49da5e83bb310aefa0a8c9319d128664fccd8e348d4b48
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain metadata related to search terms, reinforcing the lure of finding specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=best+app+to+sd+card+apk PDF link annotation
    • http://sollabs.xyz/dunkin_donuts_medium_frozen_mocha_coffee_calories1fg1t.pdfIn PDF document text
    • http://didavixakodix.22web.org/dovunene.pdfIn PDF document text
    • http://risonubokedoxav.scienceontheweb.net/sap_wm_configuration_tcodes.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/compendio_catecismo_de_la_iglesia_catolica_descargar.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/4644631126.pdfIn PDF document text
    • https://cdn.sqhk.co/pubusudes/aF5j5YU/father_son_quotes_for_instagram.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/what_are_inferential_statistics_used_to_estimate.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/gcjcYu0/silicon_valley_season_7_episode_1.pdfIn PDF document text
    • http://igcopyrightverify.com/xozakitepusfpjmx.pdfIn PDF document text
    • http://leqqurint.online/164278817785z5ls.pdfIn PDF document text
    • http://wonizojaru.scienceontheweb.net/online_editor_combine.pdfIn PDF document text
    • http://verification-help.business/nelusamowowkc0ma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://funazowo.rf.gd/xapazavup.pdfIn PDF document text
    • http://lirufuti.epizy.com/libros_sobre_aprendizaje_significativo.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/baseline_survey_sample.pdfIn PDF document text
    • http://muzobun.rf.gd/zoom_g1x_four_software.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/8755657292.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/88694686242.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_be4a71b55f3c43bd8ec6accd4ff777cc.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_5be799c5c3624d2396b397547bebedac.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_68e172996dc64176a45a4c4f364f79b9.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 4780 bytes
SHA-256: 887e87f6e681bce086bab64535b3a9daf922b92a64a679620a9ae1bb982b481d
font_02_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 10496 bytes
SHA-256: 18bb0b5fc34c67e4159d0d5a62adea04e175225ab49fc88456863b36c00680df
font_03_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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