Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ac5b1591d667b1…

MALICIOUS

PDF

78.1 KB Created: 2021-02-27 21:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2c7f018566b1dec2354eb309d4f0d2bd SHA-1: 718a4e2e7d7c1b2fd485975e1084af5a1fea45a4 SHA-256: f6ac5b1591d667b1281c94d37c7b0b70d4a412328eaea5ad35873cf32805d6f6
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple embedded URLs, including one pointing to 'jottigo.ru' with a keyword suggesting a lure, and another to 'revilokepudidu.mygamesonline.org' which is identified as a disposable hosting link farm. These URLs likely lead to phishing sites or further malware downloads.

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 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://jottigo.ru/award?keyword=international+marketing+strategy+definition+pdf PDF link annotation
    • http://revilokepudidu.mygamesonline.org/napoleon_hill_think_and_grow_rich_book.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/borifofawaxani.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/xodikunabu-korimebapodovod-bugoluvarewitiz-zamisufip.pdfIn PDF document text
    • http://christmas-gift.ru/92131456811cwo1a.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/ruvederosonotetare.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/ecuaciones_de_segundo_grado_ejemplos_con_grafica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobavukopipe.epizy.com/caller_id_changing_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/lapelow.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/18660476017.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/bepuzewebekunofu.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/drug_guide_apps_for_doctors.pdfIn PDF document text
    • http://kavezuvimibu.epizy.com/ativador_windows_7_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/gangster_background_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/bronchite_aigue_asthmatiforme.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/27276674487.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/bipul.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_off0000f4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E8 5464 bytes
SHA-256: 746beb5099cc255c408d3b421e023310953b66e0444d18a2125cb0ef4db054cc
font_01_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 10428 bytes
SHA-256: eab3589763ccdf9a6c982fa104fd68858cf8e7c9e45ec30e4d943e473687a5e1

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