Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda2df83c3155159…

MALICIOUS

PDF

75.7 KB Created: 2021-01-24 09:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c696f3ddf0e60b86778e447b6414c251 SHA-1: edb10d74530a147b7820e806b200ae0f88147a1d SHA-256: fda2df83c315515984be83fb0de34323d020601a4e5422c6b1ba0a6e14a245da
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary lure related to 'minecraft education edition' leading to a suspicious domain. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=things+to+do+in+minecraft+education+edition PDF link annotation
    • https://cdn.sqhk.co/wuvupalib/Agc9ifC/30837707659.pdfIn PDF document text
    • https://bituzuvuzi.weebly.com/uploads/1/3/5/3/135389462/soziritimigo_kitazepit.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/dGGibha/slither_io_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/7j3Ux4h/woxokiradisusezonefimale.pdfIn PDF document text
    • https://site-1224368.mozfiles.com/files/1224368/figuzi.pdfIn PDF document text
    • http://xamejaduxak.22web.org/oxygen_therapy_guidelines_2019.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/viwomojom-bozifisarekesud-vejuvidoremovo-mowilolusan.pdfIn PDF document text
    • http://ragukir.iblogger.org/30891427074.pdfIn PDF document text
    • https://site-1178784.mozfiles.com/files/1178784/stylesheet_in_html_file.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/dadubixiw-manerokomurex-newobij.pdfIn PDF document text
    • https://site-1180999.mozfiles.com/files/1180999/ionic_bond_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/fnUZIjg/wememudiwilelefusajad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://datasixiva.epizy.com/dodepebogigonomadoje.pdfIn PDF document text
    • http://xivutunitilema.epizy.com/bisaya_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/xiluwesa.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/blackmart_app_apk_free.pdfIn PDF document text
    • http://ramasewo.epizy.com/f._i._r_report_online.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/the_aviator_movie_tamil_dubbed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5352 bytes
SHA-256: 9dd2acb075ae529bb0aa74e14545a1b6fb9ffd3f62277929474238ce7b8c0d72
font_01_sfnt_off0000fd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 10580 bytes
SHA-256: 64522756eafa58bf9689ef536ec90a8f8bf9be3f4c501b97179b6d0ac5ca24b7

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