Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8574ee28ef2a93…

MALICIOUS

PDF

71.1 KB Created: 2021-06-11 13:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3c5e976d22e5d13453c09090e24c3e7d SHA-1: eebb2a16a7ea1d320f5e5c197d64d40dcd5fe482 SHA-256: 3e8574ee28ef2a93bbfaf065aa3bdacc08173ae19a04aec4eb6730ff5a9bcf45
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://ponafet.ru/123?utm_term=bendy+ink+machine+chapter+5 PDF link annotation
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/7490126.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/480082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_6046461d6214d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_6052e647ea514.pdfIn PDF document text
    • https://rusopanuguxixat.weebly.com/uploads/1/3/4/6/134640346/fasajidasoda-lenomewoj-lumive-nazagunato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fc73c1dea4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_6052816b83c5c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4412575/normal_60b6e41bc31f3.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
    • http://motekus.pbworks.com/f/1323885918.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/lalexonirexuxopolukapep.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/adding_and_subtracting_fractions_with_same_denominator_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6781badb-11a9-4abf-a19d-33282966b8a4/puwejolub.pdfIn PDF document text
    • http://pudomasepok.pbworks.com/w/file/fetch/144882009/acrostic_poem_using_the_word_nutrition.pdfIn PDF document text
    • http://fudotedafeji.pbworks.com/w/file/fetch/144799491/topologia_de_redes_caracteristicas_ventajas_y_desventajas.pdfIn PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144990027/5681020326.pdfIn PDF document text
    • http://xexufokug.pbworks.com/w/file/fetch/144804636/what_is_the_joy_luck_club_summary.pdfIn PDF document text
    • http://tuvovazuvezo.pbworks.com/f/86870145195.pdfIn PDF document text
    • http://zuwofig.pbworks.com/f/4678805624.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/let_reviewer_prof_ed.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/kadupuna_mosave_amma_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d69299e-bfac-4844-bca8-2d44021cb40b/how_to_reset_a_c1100t_modem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d62e6e-a3b9-4db0-9892-2f2d868f4952/93742690091.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144427302/how_to_prepare_moringa_tea_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381284a1-67a4-4e6d-b995-44025562ead2/78731297635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac25647e-adee-4cd9-9059-93f92eaf495e/everstart_smart_charger_code_fo1.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_off0000d067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 5120 bytes
SHA-256: 965ff7844046df86ea154a61b405a36684cf53c3ee329a4bc7664c5cd21bbcf2
font_01_sfnt_off0000e1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 9036 bytes
SHA-256: 2e7caaa4bbc8fe2ec686455338c8e3f3a105e765d1159dc911cea762bb2fc8b6
font_02_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e