Malicious PDF — malware analysis report

Static analysis result for SHA-256 d968fc0d2d0a9d47…

MALICIOUS

PDF

85.5 KB Created: 2021-03-21 05:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8482e22d8afbee17d18906c318f602f SHA-1: 9d7b93c90319d8ee7106eefc4e4de2d121f5be1f SHA-256: d968fc0d2d0a9d478c91c14c811778efb26c4530e8e9ca6a6944575d5d253cc7
186 Risk Score

Malware Insights

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

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 6

  • 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 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://lozipotod.ru/award?keyword=telecharger+catalogue+ikea+2020+pdf PDF link annotation
    • http://waferaboteb.mypressonline.com/clasificacin_de_cuentas_deudoras_y_acreedoras.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/egzamin_smoklasisty_angielski_gramatyka.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/bayes_theorem_example.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/butifovogidati.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://dowafirowelumex.atwebpages.com/do_you_wear_prayer_beads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7718cf0-70db-4deb-9519-b48161c8044d/what_do_you_do_when_your_laptop_says_preparing_automatic_repair.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_0a6e8b21bc884a26ba5f70f7080701aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e532677e-d4de-4e42-ab91-1dde2e5824cb/xamonijevotimib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d02673b-ce06-4eca-8ce2-d92f4adf60dd/blacks_law_dictionary_9th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40a9eef-5386-4f87-8269-6cb638040bc6/does_hobby_lobby_have_paint_by_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/99480245332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1695a0-17c3-4435-9f44-ddc7f049becd/82734980761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49b0a31-2251-486a-b2b7-8f476d9f6fae/how_to_find_centre_of_enlargement_and_scale_factor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2da9fae-3f4c-4555-8fa5-150d95a5f45b/circo_de_la_chola_chabuca_funciones_2019.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_9d879b9230804842bb81d7d9d3a900b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/minecraft_1._14._3_free.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_04bdf8bd04bd413a8a48d05d84022a88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab082c4-4040-4628-8896-26f5bab87e0f/58770182622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0848d260-85c0-47e1-8c34-1aaa0d6fb3cb/canon_printer_mg3520_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1057292-1a10-4a8b-b9fc-417cd10d04d1/barska_safe_keeps_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d3a0a5-8281-4bf2-8437-2d446b359209/27382205089.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_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 5304 bytes
SHA-256: b3e3d4997b38921e4974edf352733f0a0978109c8747b8ab436988a88b8fa6c8
font_01_sfnt_off00011015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 13144 bytes
SHA-256: 4fd2ea47c8a9513754a1cc72978995e3e03302651e8206c79c7cc83e7429a2dc
font_02_sfnt_off000138c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378