Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eae416c3dc07942…

MALICIOUS

PDF

83.4 KB Created: 2021-03-19 09:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35d7a7abf1223a141adef0716c62b39a SHA-1: 20e46a156f2c4bf86d61454da946152a911dd94c SHA-256: 3eae416c3dc07942c223600503d3dc1f3b72e740c1f10e2f2fd6922ef743f264
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious sites. The primary URL identified is 'https://jacksth.ru/award?keyword=marketing+process+definition+pdf', which appears to be a lure. No scripts were extracted, but the PDF structure and link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=marketing+process+definition+pdf
    • https://cdn.sqhk.co/bobavijiwoba/25Gjehd/pisapig.pdf
    • https://cdn.sqhk.co/joxutedunik/fKOgeP3/32097155390.pdf
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/2520646.pdf
    • https://bakijunida.weebly.com/uploads/1/3/2/6/132695635/rebobonet.pdf
    • https://cdn.sqhk.co/reparepoki/AchhLzV/dedodisubupapaniba.pdf
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/jelegekubas-xijat.pdf
    • https://cdn.sqhk.co/jufenakajo/MhokhdL/go_kart_racing_game_online.pdf
    • https://cdn.sqhk.co/ragebobeb/jbggK6R/talking_tom_candy_run_android_gameplay.pdf
    • http://pofuxujeku.iblogger.org/4826666853.pdf
    • https://cdn.sqhk.co/dederubap/cgiD0gf/torn_labrum_shoulder_pain_symptoms.pdf
    • https://cdn.sqhk.co/rurufimibiwe/gg9ijie/wildscapes_mod_apk_download_unlimited_money.pdf
    • https://cdn.sqhk.co/kojetovukufo/doNPQXm/complete_vocal_technique_app_download.pdf
    • https://cdn.sqhk.co/xipovowimugo/isEAmcd/familiars_5e_guide.pdf
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/9181946.pdf
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/7782360.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vagawujososoje.epizy.com/senuga.pdf
    • https://uploads.strikinglycdn.com/files/13118f8b-a0f3-4d3c-b42d-17145f647be1/what_does_red_light_on_crane_humidifier_mean.pdf
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_fe80a4c4644c4fcfa8ced4a1fe4f6bb2.pdf?index=true
    • http://vebavibokifoko.epizy.com/poburagijonux.pdf
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_d3108f47e5734ce0b3ac3fef641bf025.pdf?index=true
    • http://wesukudepabu.epizy.com/53952612230.pdf
    • http://ravuxisopol.rf.gd/dujijumadilixiluvagu.pdf
    • https://uploads.strikinglycdn.com/files/b3191ac1-f711-4b1a-99d1-c4c416c7771e/34120044955.pdf
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_9858ceef6c0945f0a445a34ee9036535.pdf?index=true
    • https://uploads.strikinglycdn.com/files/91abded6-a2cf-43f7-b10c-a7a145da2e4a/genie_pro_stealth_garage_door_opener_remote_programming.pdf
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_921bc0f579c440a6895429dd03d07940.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a1296799-1321-4353-a2b4-ceb33051993c/where_are_ephemeral_streams_most_common.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000121b1.bin
0786927129675ad6c11eb93bb1a11d05052a554cf8500ba628c2c26ed061419a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x121B1 18992 bytes
font_00_sfnt_off0000ea9d.bin
6387242902a61d694c592b83c096e29c35684f31328bb7d6c30dbb7d08ff1a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5360 bytes
font_01_sfnt_off0000fcfe.bin
b03a9375368a6f051298765a65a4ad382855f582ca8950d8d09a24ac2f506121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 10696 bytes

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