Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b76db72ffa8230d…

MALICIOUS

PDF

82.3 KB Created: 2021-03-30 12:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 161555b8bb2a73dc5982997da7a276c4 SHA-1: 29f4ecb56c9fe8f76fb8639e83c2be4109854932 SHA-256: 7b76db72ffa8230d0e715b77a2dc80449720d65ceeea321bfb5dc5bd9a603aa3
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 0.9990

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://nipisod.ru/123?utm_term=marksheet+number+in+ssc+result+maharashtra+board PDF link annotation
    • http://legobibeli.22web.org/ruwurikunojuxojanutaxawu.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/34754933781.pdfIn PDF document text
    • http://jotepuxigavof.iblogger.org/burdened_with_crossword_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/fvE1A6r/rollerball_vs_ballpoint_left_handed.pdfIn PDF document text
    • https://cdn.sqhk.co/gukomoluda/Qjjii45/dotalibevosi.pdfIn PDF document text
    • http://lixebafevoku.mypressonline.com/dowekomodewatakeki.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/vujiwulatore.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/9WTbihC/78712185448.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
    • https://uploads.strikinglycdn.com/files/c82bdb20-9073-4464-9a72-903ed1abb14b/after_the_quake_review.pdfIn PDF document text
    • http://lazubag.epizy.com/factoring_perfect_square_trinomials_guided_notes.pdfIn PDF document text
    • http://noroved.myartsonline.com/capital_de_giro_e_anlise_das_demonstraes_financeiras_unopar.pdfIn PDF document text
    • http://vonolukover.epizy.com/cisco_networking_academy_chapter_9_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32699cac-0440-42b7-a994-2dbdf1963669/wd_tv_live_hd_media_player_specifications.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/95002973572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3f9c72-5bf5-44d2-8ecc-5c049d0e8136/transitions_for_second_body_paragraph.pdfIn PDF document text
    • http://xegorifulenojo.rf.gd/download_kamus_bahasa_sunda_lengkap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb27e91-edcf-412a-a2f6-2af8e78eac6b/rawotapumenijokila.pdfIn PDF document text
    • http://tewowes.rf.gd/teleduzitiropujev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452f8310-de12-4468-85fe-1a6e43dd27fe/audacity_of_hope_audiobook_free_download.pdfIn PDF document text
    • http://kitukogoxav.epizy.com/65129593392.pdfIn PDF document text
    • http://zefinut.rf.gd/63008316078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6ef09a-2c1c-449a-a1ab-326aaf9efb17/wujudazidekigudofis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15bb60c-99e2-4d59-9cb1-7ed8a71263b2/bissell_proheat_2x_revolution_pet_pro_carpet_cleaner_not_spraying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6f975a-32f7-43d7-b1cf-12303b129746/the_casual_vacancy_hbo_trailer.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_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 5268 bytes
SHA-256: 75c14a1e3ae7fe4963d23cc224d29bd7cd2bad058ac4bd707a7c7d37d6aac231
font_01_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 11456 bytes
SHA-256: 4e1a9bc086fb3cbb3c71803106c95705dadce19add0db7131e28c44359594de2
font_02_sfnt_off00012ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230