Malicious PDF — malware analysis report

Static analysis result for SHA-256 44034e4097227093…

MALICIOUS

PDF

75.1 KB Created: 2021-03-13 18:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb79bc7f03b9a81299ab850d19b0383 SHA-1: d27742a8bdec8dd26c4d74b8ef3c2f3ad4cc1578 SHA-256: 44034e409722709318225c5ba150cec9ea0ffb4cf5c0be9ff97d33eba79831e6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URIs pointing to external websites, with one specifically identified as a link farm on disposable hosting. The presence of these links suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=2+negative+effects+of+imperialism+in+africa
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5fcae5e5d6d89.pdf
    • https://vusekuzobogurow.weebly.com/uploads/1/3/5/3/135327372/lajifotofo-sojebisaxif-ravemazes.pdf
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5fd856b6bf9ac.pdf
    • https://cdn-cms.f-static.net/uploads/4411252/normal_601b6e524d396.pdf
    • https://static.s123-cdn-static.com/uploads/4427501/normal_5fc84ff553060.pdf
    • https://cdn.sqhk.co/sovanoniwuva/xe5zhaS/download_jungle_heat_mod_apk_android_1.pdf
    • https://cdn.sqhk.co/mitugejaxel/he3GhjO/mystic_diner_restaurant_menu.pdf
    • https://cdn.sqhk.co/veladaxuzeba/jeJsf8Q/49473376151.pdf
    • https://numuladak.weebly.com/uploads/1/3/4/6/134613837/dojarekodarobewizupo.pdf
    • https://cdn.sqhk.co/pasepizut/MhaMjc4/73337006150.pdf
    • https://cdn.sqhk.co/natefisaka/ejihcge/40381888950.pdf
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5ff46f0f2cb88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wefemabeni/norwegian_english_dictionary_download_for_pc_offline.pdf
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_ec210a4b4004481181ba86f5a586fbb8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e4ddc503-1ad3-4618-862c-d9b26ad561f0/what_is_the_big_bright_star_tonight.pdf
    • https://uploads.strikinglycdn.com/files/308a54b7-7979-452b-ac5f-6ce06152624e/13950971443.pdf
    • https://s3.amazonaws.com/moduxanakuri/wopekobunojab.pdf
    • https://s3.amazonaws.com/nafamaragisek/32105345283.pdf
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_5c4fedcdc5694d9eb6249d5844e337ed.pdf?index=true
    • https://s3.amazonaws.com/godoremitiwuja/ice_breakers_questions_for_team_meetings.pdf
    • https://uploads.strikinglycdn.com/files/c843993b-bede-4a6c-9870-b83b638a0a50/2002_ford_explorer_starter_replacement_cost.pdf
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_14b1dc10377b46ccb98f249bbc74ae1f.pdf?index=true
    • 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_off0000e6fb.bin
1f25da0e7ff841c60e9ab16ad9d3e71c220d4211ead0348d3b1c41f5be4af0f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 5432 bytes
font_01_sfnt_off0000f971.bin
f600d5095be3f74165b59cb201fdbf5c1677074a9de78d607e06d8d6a5bc6c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 10516 bytes

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