Malicious PDF — malware analysis report

Static analysis result for SHA-256 1479564bae2bf556…

MALICIOUS

PDF

85.2 KB Created: 2021-03-29 10:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 621bac362055aa89ddd84d9fe67b03ae SHA-1: 218dd742770c53b53527b59072fa89fc4e290050 SHA-256: 1479564bae2bf55635ecdf879489fddac83d263fd5d603e20a7e7cfb96a42ee6
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command execution indicators within the document text, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://dugedepap.ru/strik?utm_term=list+of+greek+and+roman+gods+and+goddesses+and+their+powers PDF link annotation
    • http://discovljzg.fun/gospel_of_wealth_gilded_age_apushf51po.pdfIn PDF document text
    • http://topcreditcheck.info/how_to_set_a_voicemail_numberuynb3.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/d8mWjdg/dosevomap.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/dhfLIgj/equalizer_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/bsghsHL/shudder_app_ps4.pdfIn PDF document text
    • http://job-finder.space/xejesuzizab9redu.pdfIn macro / runtime command snippet
    • http://tomogorman.com/war_of_the_worlds_2019_tripod8xaq2.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/kejenatifowebisoruze.pdfIn PDF document text
    • http://laxuribotu.iblogger.org/rowoluzozigu.pdfIn PDF document text
    • http://wusator.mygamesonline.org/automate_convert_excel_to.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/jggjicQ/54547072254.pdfIn PDF document text
    • https://cdn.sqhk.co/kamepixuxuk/gcsPdjd/35409526995.pdfIn PDF document text
    • http://twitter-center.com/libro_el_monje_que_vendio_su_ferrari_por_capitulos03sza.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/capm_assumptions.pdfIn PDF document text
    • http://hookup158.fun/72329085031fmtds.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumumiz.epizy.com/nutri_ninja_smoothie_recipes.pdfIn PDF document text
    • http://sirevonigira.epizy.com/how_to_define_curls_on_4c_hair_without_gel.pdfIn PDF document text
    • http://jojoleru.epizy.com/calculus_sixth_edition_swokowski_solution.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/mexijegedakol/chirkut_odia_movie_all_song.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/pioneer_dxt-2369ub_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tigerivupogil.pdfIn PDF document text
    • http://merojupamen.epizy.com/darabiguwixedev.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_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 5520 bytes
SHA-256: 69b956fb056994b2b9e2b5c97cf474bf5e485d0b6b7a6af3f1d1ebdec547b994
font_01_sfnt_off00012155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 11108 bytes
SHA-256: 1069e81d306ddca781701d21d9dee45c89433e49bc1b806f4f50b9c454e92ce8