Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119ead47e3ca766…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 04:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 52f018b2bd37864693693be98872c96c SHA-1: b1773338dff7ce01e7b3ea96c7f9f2f4df0f5912 SHA-256: 1119ead47e3ca766ea91b8f4668bf86d12d99b3639581be05c9b373f65e75884
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to computer components, likely to entice clicks to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=what+are+the+five+classic+components+of+a+computer PDF link annotation
    • http://ketokod.iblogger.org/portable_beyond_compare_free.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/waxifunobuzodojosulitetig.pdfIn PDF document text
    • http://kaxiwex.iblogger.org/guia_de_ejercicios_de_angulos_en_la_circunferencia.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/ecology_and_environment_pd_sharma_13th_edition_free_download.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/gibexigewovuzewodosiwixaz.pdfIn PDF document text
    • http://dragonflysagewellness.com/tru-_grip_clamp-_n-_tool_guide_243ipo3.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/40121214621.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/what_channel_is_peoples_choice_awards_on_xfinity.pdfIn PDF document text
    • http://ditilage.22web.org/diramolamitewiwefimikafo.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/pendidikan_islam_di_malaysia.pdfIn PDF document text
    • http://idealica-italy.site/present_perfect_affirmative_negative_and_questions_exercisescyo4y.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://gozulejawefufap.epizy.com/windows_10_firewall_control.pdfIn PDF document text
    • http://sikunuvojujomim.epizy.com/63643754897.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_6b6f0eaac82f4578a208a0a0493f0152.pdf?index=trueIn PDF document text
    • http://fidalanono.myartsonline.com/oxford_english_dictionary_2020.pdfIn PDF document text
    • http://livewimujekofo.rf.gd/cuantas_clases_de_sistemas_operativos_hay.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_9e98c51d62754a3db80204f25d253d1a.pdf?index=trueIn PDF document text
    • http://pikubub.onlinewebshop.net/59130139239.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/java_an_introduction_to_problem_solving_and_programming_7th_edition_by_walter_savitch.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_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 5208 bytes
SHA-256: ef006836629401ce8a2317825e0f7d6e1c1743235fe497ee270eaac9bf0be834
font_01_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 10472 bytes
SHA-256: c349ecad6b5238348eb6eabf79132ebf470aa63c07cb3d8e2acf6aa8ea92c78c
font_02_sfnt_off000115dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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