Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22dc0bc67de8b8c…

MALICIOUS

PDF

86.7 KB Created: 2021-03-19 06:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 024446cf7cd0073de1e2151bb78aa32d SHA-1: db78443750f8d0c865e55ede885758020bf12b8b SHA-256: c22dc0bc67de8b8cfbc3ac21b885552b26eaeda08691f8da627fd9e739ff04b5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=7+steps+digital+marketing+strategy+guide PDF link annotation
    • http://bu-markett.com/yin_yoga_poses_before_sleepxl4ab.pdfIn PDF document text
    • http://pop-marketplace.ru/soduluxam59xpj.pdfIn PDF document text
    • http://findssldz.xyz/negisutan7djm.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/wixujidanubilosepanevefivrvsn.pdfIn PDF document text
    • http://dfds.in/the_lying_game_book_synopsis9rj9a.pdfIn PDF document text
    • http://buylettersonline.com/keboloda8oodc.pdfIn PDF document text
    • http://furafofuvobomu.22web.org/ganipufasobirubine.pdfIn PDF document text
    • http://gvidilon.ru/bow_tie_pasta_salad_recipe_with_fetardnmf.pdfIn PDF document text
    • http://sodahq.pro/data_science_jobs_nycizizf.pdfIn PDF document text
    • http://gbo.guru/risivowuzaxifarawetidue2vtg.pdfIn PDF document text
    • http://fasibada.22web.org/calculate_depreciation_using_balance_sheet.pdfIn PDF document text
    • http://boburokopuxixud.iblogger.org/ronef.pdfIn PDF document text
    • http://postel-na-zakaz.ru/dell_e207wfp_monitorbkeo4.pdfIn PDF document text
    • http://pubgucbayim.com/posawapifunetivilajig1bbj.pdfIn PDF document text
    • http://bestsaleshopin.xyz/wolurudelinaninawatebnuxw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poparefonuvukoj.rf.gd/android_translate_animation_repeat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3f13eb-65d4-4935-942d-78fb7085107c/bakukilijokelanasawejukuz.pdfIn PDF document text
    • http://vijijowop.epizy.com/bexej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0d196f-0a3e-4227-9d68-95ac3a251b98/what_are_goosebumps_books_about.pdfIn PDF document text
    • http://zupurusos.rf.gd/les_principes_de_l_agriculture_biologique.pdfIn PDF document text
    • http://zananus.rf.gd/microsoft_wireless_mouse_5000_troubleshooting.pdfIn PDF document text
    • http://fevidubigozexa.rf.gd/looking_after_the_environment_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75be7944-36e4-4fb5-8d9c-9525ceff52f4/romeo_and_juliet_act_1_scene_1_script_with_line_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955e889e-22e9-4321-9036-cb2dfc6d8a69/zenavewiwumadugixedosipod.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/kannada_2018_movies_in_tamilrockers.pdfIn PDF document text
    • http://vamovatalugoja.epizy.com/feedback_form_for_students_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020bce61-1413-46dc-8d5c-4cc9f42e1c96/44037649785.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_off00011543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11543 5432 bytes
SHA-256: f2e5f5da32e4735665fd56a038e1920ecf21257dc63ac2cd4ad324caec2ecb83
font_01_sfnt_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 10888 bytes
SHA-256: c99cb2e8fc54a759d19b690b365a08297c310bf57902f66aab0a410887557e99