Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bb941b47fc615f…

MALICIOUS

PDF

73.7 KB Created: 2021-06-07 09:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46459f3e38dd63ebd6af1d7d028d8338 SHA-1: 0e3200820e1b996bc7bd0b3d6b7e9d5fc5244924 SHA-256: a2bb941b47fc615f8d5a52c355d45e36a9012fb62b7356235db327815d62b9b1
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 0.9956

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://garglob.ru/pbw?utm_term=descargar+dragon+ball+budokai+tenkaichi+4+para+android PDF link annotation
    • https://sijokazodile.weebly.com/uploads/1/3/1/4/131454207/1025821.pdfIn PDF document text
    • https://zisawotagaxikad.weebly.com/uploads/1/3/4/4/134478332/e6894a7e09f95.pdfIn PDF document text
    • https://tafajasezo.weebly.com/uploads/1/3/4/3/134312542/muzetumajakul-wijewaronidezip-nirataxalemor.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/0485dea102dcf40.pdfIn PDF document text
    • https://jegolufu.weebly.com/uploads/1/3/4/6/134677495/b3795423cee79.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/gisubu.pdfIn PDF document text
    • https://vewifofuk.weebly.com/uploads/1/3/5/3/135394013/gagumiximu_roliw_xevikuzaso.pdfIn PDF document text
    • https://sirazetagur.weebly.com/uploads/1/3/5/3/135328448/9464828.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/4903884.pdfIn PDF document text
    • https://buxapuwale.weebly.com/uploads/1/3/2/8/132815799/8802472.pdfIn PDF document text
    • https://dekodisiga.weebly.com/uploads/1/3/6/0/136051758/fatalefuxopegi.pdfIn PDF document text
    • https://kojegowi.weebly.com/uploads/1/3/4/6/134685768/790cf.pdfIn PDF document text
    • https://lexabefi.weebly.com/uploads/1/3/1/3/131384613/zosofuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jozeluwofe.pbworks.com/w/file/fetch/144606864/shh_koi_hai_vikraal_all_episodes_download.pdfIn PDF document text
    • http://tekitejug.pbworks.com/w/file/fetch/144612180/how_do_i_reset_my_logitech_h600_headset.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/w/file/fetch/144711129/the_sims_3_mod_apk_data.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144572355/mission_mangal_full_movie_hd_video_download_123mkv.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/f/lista_de_exercicios_numeros_inteiros_7o_ano.pdfIn PDF document text
    • http://bilabegape.pbworks.com/w/file/fetch/144632751/1996_ford_ranger_seats_for_sale.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/brother_mfc-j5910dw_service_manual.pdfIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144759156/is_there_a_us_military_base_in_stuttgart_germany.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/w/file/fetch/144664911/dufesevovitasuri.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144444573/link_map_clash_of_clans_town_hall_12.pdfIn PDF document text
    • http://mutoteja.pbworks.com/f/food_web_worksheet_answers_biology.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144439041/67707487972.pdfIn PDF document text
    • http://jedilukiwo.pbworks.com/f/distinguish_between_homologous_analogous_and_vestigial_structures.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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5628 bytes
SHA-256: 888016ef4f252bf61929546edb3d2453b60df5ab00ce109723c33174690d4af1
font_01_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 10924 bytes
SHA-256: af72e872f5911ce9cbe72788bbce9bfe357104b9fa4c560d59f9357767e26273