Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0436257c42e83f4…

MALICIOUS

PDF

82.4 KB Created: 2021-03-07 08:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7b3733a5234f5df185b1d3f5040e864 SHA-1: e2f77a26a72661901b5e0e0adcf9174a095687df SHA-256: f0436257c42e83f42ed4ef90bed5571c11794cd72c61084b82f95df8b5a9c45d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the large number of extracted URLs suggest the document is designed to redirect users to various external sites, potentially for phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/aws?utm_term=wine+fridge+making+popping+noise
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/sinaxevisosazexeten.pdf
    • http://copalofa.site/retirement_planning_workbookt9msq.pdf
    • http://fasoxuxesatilu.sportsontheweb.net/27538853557.pdf
    • http://vudifabofugejij.medianewsonline.com/vejujuvakofofupelu.pdf
    • http://toolsbestpricemicrometer.site/rugofopudizunobukebidowag9z9pd.pdf
    • https://puraxexi.weebly.com/uploads/1/3/4/7/134718411/tetora-tidodalujadi.pdf
    • http://waystep.site/xawedida1tcvw.pdf
    • http://palawawez.mypressonline.com/47511774136.pdf
    • https://nefotinabe.weebly.com/uploads/1/3/5/3/135314884/xudelu.pdf
    • http://8gusevshop.space/foolproof_module_3_test_answers_quizletkuqlq.pdf
    • http://uscovidcharts.com/dibujos_para_colorear_halloweenuxfc5.pdf
    • http://sodaapp.pro/bad_public_relations_examples_2019i3r39.pdf
    • http://xoroketogejuxe.mywebcommunity.org/install_hp_photosmart_c4580_wireless.pdf
    • http://smartline58.ru/83620693072druxx.pdf
    • http://getyourscore.info/19579308265ldqx9.pdf
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/pinutet-fujetijovomaf-raxifikor-torar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/guwutivupudutu/xuxigowojuka.pdf
    • https://s3.amazonaws.com/sasufufa/new_catholic_encyclopedia_vol_1.pdf
    • http://ralirajuz.atwebpages.com/how_to_fix_a_jacuzzi_tub_motor.pdf
    • https://s3.amazonaws.com/jijumupade/how_often_should_cardiovascular_exercise_be_performed.pdf
    • https://s3.amazonaws.com/teximikamukubo/vebegigadapamefuv.pdf
    • http://gozenabuzixi.onlinewebshop.net/specialized_bike_computer_sport_manual.pdf
    • http://zowofiz.myartsonline.com/similarities_between_abraham_lincoln_and_andrew_johnson.pdf
    • https://s3.amazonaws.com/kagedatabujo/relivet.pdf
    • http://memamawu.onlinewebshop.net/wuxosod.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f836.bin
b1300cfa3eb325bc59d2ba8dd8780ea579fab097b54028db53a4dd3e631e40ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 5116 bytes
font_01_sfnt_off00010986.bin
c86252b717f7506cc0ac7df625d7684ea91aa9db213919b4e97f270559b05ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 10564 bytes
font_02_sfnt_off00012da6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA6 4324 bytes

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