Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b02186ad256ebc5…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 06:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a49cdd553dc0f525186dd65ebc1c5c18 SHA-1: cef627d590850e6f850f857d95ab95b37cfac80e SHA-256: 0b02186ad256ebc56f37e38203392672d92e3e95727c51d6fdbfcb4943cfb613
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with exam routines, suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/award?keyword=bteb+ssc+exam+routine+2020+pdf PDF link annotation
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/bugefu_paxubu_gijosis_jogit.pdfIn PDF document text
    • http://mrshadow.net/oracle_database_12c_installation_on_linux_78wssh.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/5009984.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/wowotawadusuxur_ronexinep.pdfIn PDF document text
    • http://nijuwebil.iblogger.org/82372432494.pdfIn PDF document text
    • http://poxinezov.iblogger.org/dobitejitejedinanomeke.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/zemupozogowo-fadavi.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/porazujo.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/wegomiliw.pdfIn PDF document text
    • http://discout.online/aisi_420c_datasheetdgq74.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/38216446514.pdfIn PDF document text
    • http://uscreditreport2021.info/youth_basketball_offense_against_man_to_man_defenseom8xt.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/what_is_a_spiral_curriculum_in_medicine.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/kisuwubaropiripo.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/substance_abuse_counseling_theory_and_practice_5th_edition_free.pdfIn PDF document text
    • http://gufutaca6.xyz/degoduqg20k.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://nipuxedexup.epizy.com/bewakoofiyaan_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/asciidoc_table_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/lake_michigan_fishing_report.pdfIn PDF document text
    • http://xonuxaxilajol.epizy.com/grade_1_journal_writing_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/sutokavoluwizopukonozev.pdfIn PDF document text
    • http://kumobeba.epizy.com/aambala_movie_video_songs_mp4.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_off0000e184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE184 5680 bytes
SHA-256: ccbea56e82ef4c34255bcdabc1fdffcb3068dad4826a77963448c1a037c40249
font_01_sfnt_off0000f4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C3 10572 bytes
SHA-256: 7fff176cca9ed73f948e5812e5e7e1bf6b18d5d0837601cbcba08ebb1f90003c
font_02_sfnt_off000118f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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