Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7101cf42cf99304…

MALICIOUS

PDF

74.8 KB Created: 2021-06-02 07:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f9f757948f4fce2669a13c125e668b3f SHA-1: d3c76401bd214fc88afe20e2d1cc5d3c7a211f3a SHA-256: e7101cf42cf993046f4bacd74c0d239e70cc19f87bdc1422dd72ae6c8ccc25a8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to a site offering game hacks and mods, suggesting a phishing or malware distribution lure. The presence of external URIs and a link farm on disposable hosting further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://chcial.ru/pbw?utm_term=kick+the+buddy+game+hack+mod+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427080/normal_6044cb44b6177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5fd8426a4874d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fd628faf2c89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445334/normal_5fdcf841d60d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_605baa84a39cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronefete.pbworks.com/f/21860603455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df53adc-9776-4427-9e90-e0085dde50c8/kudodow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57211c5-7b4b-4400-a3f5-eea75ad3aeed/wilixes.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0e5d5e-739e-4d3c-9157-8604e0c774e0/what_is_a_good_conversation_topic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2054aab0-9fcc-43d2-a7fa-d1d7e51c4154/the_percy_jackson_book_series_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf01f3f1-0d20-4c0a-8ac7-9c9d9a38d015/8910431536.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144421245/nogiwipemalok.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/pixotoser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451279dd-67b3-4bf6-a265-0ff5f24a402f/six_of_crows_netflix_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e277fb-9f9a-4c76-9a68-38a89dd982e7/13842819689.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/71267109104.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144424836/67782422393.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/65338505592.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144487206/gta_san_andreas_game_download_for_windows_10_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee196071-5ea5-4766-a1ac-46b1fc6431ce/gasigorumij.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/f/mount_and_blade_warband_floris_mod_trke_yama_indir_bd.pdfIn PDF document text
    • http://nugewus.pbworks.com/w/file/fetch/144491760/exercices_les_familles_de_mots_cm2.pdfIn PDF document text
    • http://wusagem.pbworks.com/f/android_version_for_samsung_tab_3.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_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 5444 bytes
SHA-256: 6fa695a2d34b6b15855fd54679178a16c4de61290ee2e698c0f7632d075f9564
font_01_sfnt_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 10936 bytes
SHA-256: 2a882ea85b309685c65613961516965fa01eddd4ed2f1b7ccb1504529cc9a5d7