Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50edd15ff2c02a0…

MALICIOUS

PDF

78.9 KB Created: 2021-02-28 06:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 77fdb09ffa85935c45620be24a906deb SHA-1: 65b878d7fc27b820c834fb349cd2ae1614a20012 SHA-256: c50edd15ff2c02a044a27435a46c93ec1144d3edc026ec776c5091619a499b35
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure users into downloading further payloads or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=sadhguru+books+online+free PDF link annotation
    • http://sputnews.com/hare_rama_hare_krishna_movie_songs_free_download81rcq.pdfIn PDF document text
    • http://tekplafond.xyz/97170835420grtjv.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/10370205332r6o43.pdfIn PDF document text
    • http://hookup153.space/gatippbdim.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/mufuladupanugelevo.pdfIn PDF document text
    • http://amandeepsadyora.com/72095169042tt2kb.pdfIn PDF document text
    • http://carbackseat.site/browser_video_player_androidi7oio.pdfIn PDF document text
    • http://circus.market/polaroid_p7100_tablet_reset5ugo6.pdfIn PDF document text
    • https://wetugaremuzen.weebly.com/uploads/1/3/5/2/135298520/nivagevofoba_xajosatovisod_busupikolu.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/81524099713.pdfIn PDF document text
    • http://finansi-7.online/is_trig_for_right_triangles_onlyv6hvf.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/19703156793.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/zujubemog.pdfIn PDF document text
    • http://vezerfa.xyz/cbs_news_dc_reportersoak1r.pdfIn PDF document text
    • http://dkblogin-de.best/how_to_clean_window_air_conditioner_filterr87cz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://turegipamikum.epizy.com/angular_2_ngif_else_template.pdfIn PDF document text
    • http://tarusuja.epizy.com/python_flask_template_directory.pdfIn PDF document text
    • http://vuzosade.epizy.com/filovidarekogiboxakeponig.pdfIn PDF document text
    • http://fokugogubegu.rf.gd/what_does_the_word_mean_greenhorn.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_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 5476 bytes
SHA-256: 746fe345ebbf044446c7ae33bbd3509971bf482048415e1a56e3f2fe42ea5097
font_01_sfnt_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 10472 bytes
SHA-256: 692aaaa4d114b4a0f913d6ed449885a15c0d159ebe2570a42827da4990fd7b60

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