Malicious PDF — malware analysis report

Static analysis result for SHA-256 868b8f1184ca121f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-06 03:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42df7873315dc7a88083c974cc33d50b SHA-1: d5157c3345577d8189560b7527e4a7de0ef819f3 SHA-256: 868b8f1184ca121ff9ce7c97f54c4ec4eaf78cefd71f84708346d4b547ac1faf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one that mimics a search engine result for 'What is the salary of a system administrator', likely to trick users into clicking. The PDF also utilizes link farming techniques on disposable hosting, indicating a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=what+is+the+salary+of+a+system+administrator PDF link annotation
    • http://kaxavetaxudu.mywebcommunity.org/55022033222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fe46797bead7.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/omphhgd/fusobubakutapuloxitiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5fd9fb1387dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_600eb2f118bb8.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/19983814081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_602a0f8a082b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408333/normal_6004acb3a35b0.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/Qjejj2y/auction_sniper_free_download_rexdl.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/wagawidoremubeli.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://bimokiteguzosuw.rf.gd/68242519081.pdfIn PDF document text
    • http://veboluzamusi.epizy.com/9626085206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b58009b-6b8f-4c61-b21e-1bc4aa6d805e/air_force_academy_application_cost.pdfIn PDF document text
    • http://nenimon.epizy.com/71473854307.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/how_to_hide_caller_id_on_your_phone.pdfIn PDF document text
    • http://sasugokomelu.rf.gd/charlie_movie_tamilrockers._gs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b231c6-bf9c-452d-9f3f-abff487d7771/how_to_set_orbit_irrigation_timer.pdfIn PDF document text
    • http://divupovive.epizy.com/wufudo.pdfIn PDF document text
    • http://vuxubeso.rf.gd/emulator_ps2_android_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e4169e-6613-420f-a257-096cf9f80b43/50654104156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d700941e-90db-461e-9055-ab3ac9bb7ea0/bipokaxuzazalotokox.pdfIn PDF document text
    • http://vezubigaru.rf.gd/vezanorisaximinomer.pdfIn PDF document text
    • http://tikokowekujuw.epizy.com/weber_bbq_replacement_grates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED17 5048 bytes
SHA-256: 8cc61e86b8462c46604de25247f8986612c63b897233fb93bd0218c59936252d
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 10732 bytes
SHA-256: e782e1bbd769a8cf7a8268f8f1720dbb56b5f8c641298c8ac27e5d4876b29c7a
font_02_sfnt_off000122bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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