Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfb0d934e84a9fc…

MALICIOUS

PDF

88.8 KB Created: 2021-03-20 22:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b3e174d9ba6e2d6f4f08dd412570de6 SHA-1: 53807565b2caa123c9947c42133e0975657a0e68 SHA-256: 6dfb0d934e84a9fc50553fea17de3423695aa0c954690962bbed243c63040b67
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://soxebez.ru/award?keyword=marketing+research+process+pdf PDF link annotation
    • http://vowavosudepomu.iblogger.org/how_long_does_it_take_to_get_a_private_pilot_license_in_canada.pdfIn PDF document text
    • http://rokamik.iblogger.org/ctet_answer_key_2020_paper_1_set_q_download.pdfIn PDF document text
    • http://potavivas.22web.org/sowuvagufixi.pdfIn PDF document text
    • http://good-production20.site/hotel_formule_1_bagnolet_prixu6glf.pdfIn PDF document text
    • http://finansi-7.online/patient_admission_form_templateiz83r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/112fe6ea-209d-4a40-98b9-9f6f6066e606/78744447757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4097350-03a4-475d-8d26-62151f4d5b38/vasipapefunasilesawu.pdfIn PDF document text
    • http://tunazafagid.epizy.com/biodata_format_simple.pdfIn PDF document text
    • http://tekarileted.epizy.com/amoeba_sisters_video_recap_prokaryotic_vs._eukaryotic_cells.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ad31e7-a24d-4696-a653-58fa19a22efd/5926454126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6c06ab-6e21-4be3-9075-5bf453cf6458/57374612377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e84b688-44c0-4399-be8a-6ea4f9930fa8/gifoletad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec40b261-e398-49d0-afe8-ead316128440/asus_maximus_viii_hero_memory_compatibility_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3696f226-1e3c-4a4f-8178-3674fe2a6359/what_do_i_need_to_renew_my_alaska_drivers_license.pdfIn PDF document text
    • http://desiwafinu.epizy.com/4217816417.pdfIn PDF document text
    • http://jiroribi.epizy.com/37717206488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454720b5-2fff-4976-bcd6-8c8697e04a07/what_is_meant_by_enthalpy_of_atomisation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d477c3b-90c7-481e-93a5-54eb04c864e0/my_husbands_secret_wife_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18aa9b5b-d752-4345-8f87-5628715c0982/39159016844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26081f32-db78-47ea-8cea-bf5b3ba6d822/12829745297.pdfIn PDF document text
    • http://vuzogumav.rf.gd/81586647829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8f7c05-7ddf-476f-968a-eeabcf9bbe64/how_much_cost_to_install_sump_pump.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_off00011de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 5456 bytes
SHA-256: 1b962714f97af12411bba13e6b08d0bfed7277c46cff4af38a9b41f9f71781c0
font_01_sfnt_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 10976 bytes
SHA-256: 99e4f0c79b3b08e246c654d58e5a5617db2444b6a4d160180c484ce9aafcffea