Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1026c508a699fd…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 03:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 69452509c547237aa8797fda1ba0e054 SHA-1: 209064af7c7ec3f79353725f033ff99bc619a38d SHA-256: 9d1026c508a699fde11473062a3b56a9caaaae7b1c34db5a20f6bc125e63a609
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and one specific URL is presented as a driver download. This behavior, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and likely contains further lures or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/123?utm_term=fingerprint+driver+for+hp+probook+6460b PDF link annotation
    • http://pedugubugof.mywebcommunity.org/minuet_in_g_minor_bach_piano.pdfIn PDF document text
    • http://tixanijematewe.mypressonline.com/contoh_soal_akuntansi_perusahaan_dagang_beserta_jawaban.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/how_to_label_multiple_plots_in_mathematica.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/xaninudokatogok.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/medical_leave_application_letter.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/topics_in_algebra_2nd_edition_herstein_solutions.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://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_3ee61ea1e1374036b5b5d141bf7e1bad.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_2f301fc7bf454a89b4adf01a7ca0af17.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_f77e04b707444521a70d70f975ecab57.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_6b83e30365b24ff486d692ec4a41c5a0.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_233451d2d21a4125a11c121b861e0b62.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77e9efa-91c6-4fcc-b73d-06c8d3ee0e79/how_to_lose_weight_fast.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_1b24ebfbc6314881b8e5f85ed422d524.pdf?index=trueIn PDF document text
    • http://nosigegu.onlinewebshop.net/how_many_calories_in_a_restaurant_chicken_soft_taco.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_3f5e776c2df44ca3ab25247b933f9159.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15179a9-121f-4f6e-8336-1f6d50fb625b/how_to_sign_up_to_test_covid_vaccine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7336d475-247a-495a-a069-8e2eebdc45ee/todojewapakulofejamani.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/design_of_aircraft_corke_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7977f2d9-af7e-490a-88f1-e4b4a9f6121c/what_to_do_if_your_swiffer_wet_jet_wont_spray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482f65f-080b-4a62-822f-dd209a5562cb/giguzedasisanuvefuzeki.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/craftsman_10_inch_sliding_compound_miter_saw_with_laser_trac.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/nudowa.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_off0000fc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC49 5276 bytes
SHA-256: edd119fa2232701668b51386233edbbea73ef8d1d2e6c8be90383de0e8e33f2f
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 10136 bytes
SHA-256: 0887bab205d8eee8317c8d60c7aadb09400e9cb62abf1ecab892106b051ed223
font_02_sfnt_off000130fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333