Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf82763b3cf4b2ff…

MALICIOUS

PDF

80.5 KB Created: 2021-05-08 15:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d95b2ee1a27f1b09a4f9ce4a0b4a4dc6 SHA-1: 97e7c48b90fc1b93feb34afc3a3ca33b539193d2 SHA-256: bf82763b3cf4b2ff4744cf1ff73e6792d1cde3697e082ab25f0e49c503785bf0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=what+is+honda+atf-z1 PDF link annotation
    • https://sisivijujejaliw.weebly.com/uploads/1/3/2/7/132741673/zodipi-juvoxumozeniwi-bisuwibivujup-pukujolasuvamid.pdfIn PDF document text
    • http://kudeduvedum.iblogger.org/fananaxovoxope.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/1EhcQgh/your_world_s_not_falling_apart_lyrics.pdfIn PDF document text
    • https://wemivera.weebly.com/uploads/1/3/4/3/134311686/lazudewik.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ijcjghc/infinity_army_list_builder.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/5572919568.pdfIn PDF document text
    • https://poxokisajape.weebly.com/uploads/1/3/4/5/134592502/dipup.pdfIn PDF document text
    • https://basivuto.weebly.com/uploads/1/3/4/6/134646412/83e998.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/Rjejjgi/21032787774.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/1839d1bdc2600d.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/XkZbLGg/tiny_blade_dark_slayer.pdfIn PDF document text
    • https://libakitaxejadeg.weebly.com/uploads/1/3/4/0/134096258/3620546.pdfIn PDF document text
    • https://xaxafojub.weebly.com/uploads/1/3/0/7/130738676/pobagebudo_lememiv_kizuj_bukubi.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/tipos_de_accidentes_laborales.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/NjbhfTu/the_ice_cream_parlour_leeds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larovitivejel.atwebpages.com/15786364478.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/lesson_7.1_skills_practice_unequal_equals_answers.pdfIn PDF document text
    • http://kufuwajasuge.rf.gd/how_to_play_curse_of_strahd.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/sifepemorovupozabupi.pdfIn PDF document text
    • http://botozagelexi.rf.gd/call_letter_for_job_joining_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/72360311752.pdfIn PDF document text
    • http://filirepakej.epizy.com/febigeja.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_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 5016 bytes
SHA-256: c7ee0ec917057bc2c473f1bebe61805608870a031e381fddb319be7c3db8ae3f
font_01_sfnt_off00010ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED4 11072 bytes
SHA-256: a3db8345f98d17b8db95057c55c5955422654598a8f2725a10394ae9f4c180bf

Open this report in the interactive analyzer, or submit your own file for analysis.