Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24c2fe2e97b9c6a…

MALICIOUS

PDF

75.6 KB Created: 2021-06-10 03:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9f4c49c8b245806b33d70726fcf6d4a SHA-1: b008342f754deef744dcc1910fb8c7fc720c45e0 SHA-256: c24c2fe2e97b9c6a9e9948a19a83434be7b2aa79d88b3e9bf3f843fcb2833179
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 0.9991

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://smidgel.ru/pbw?utm_term=twilight+4+full+movie+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476418/normal_604fbd8aa9a10.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4492871/normal_60b7976c3587e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389101/normal_5feedef76592b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelivesas.pbworks.com/f/53867760310.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/acordes_de_teclado_cumbia.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/f/tarokavorawofemesuduwig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec1b40f-f8f1-40c6-ac3f-40bdf3d8bab6/lonotife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a55b32-bf16-496c-beb2-9c3c32cd9ee2/vawewas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a2052f-29e8-4ed1-b0af-29d0062505f7/american_legion_travel.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144622728/kefeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2a5e2a-c73e-4239-a0f9-24bf023b12e5/how_much_does_a_health_information_technology_make_a_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6c81d3-19af-4ea1-b278-8b443268edb7/75730509022.pdfIn PDF document text
    • http://jevibufile.pbworks.com/f/what_is_the_meaning_of_listen_verbatim_quote.pdfIn PDF document text
    • http://redejok.pbworks.com/f/lapemiluguze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50e6ff5-67e0-4d8d-b30c-618b224d74bb/dixokofenepexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e702fcd-bd05-4bb0-9c5b-2a184b244b7e/gutugorijapopavaxisabibe.pdfIn PDF document text
    • http://vowetegaperi.pbworks.com/w/file/fetch/144892836/biochemistry_u_satyanarayana_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab63201a-3fe1-4cf2-9b57-024e1667e777/sopa_de_letras_para_adultos_para_imprimir.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144865917/rifepakeririsibulemagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52618517-b56b-4da7-9d57-d11cfefc0a0f/16636342230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6368a4e-60e9-44d7-971c-b8ee77a2c49d/wopomuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915cd623-7307-4fe9-8e8b-ba83c6b6a7ee/clicker_remote_keypad_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d1a4cb-2ddf-4093-9afa-979f4c92f679/29967779547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fa68d8-9264-4d2c-9880-eb9aa3eb231f/yamaha_rx_v475_price_in_india.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_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 4980 bytes
SHA-256: 1af273dc4b6ef205bf632e731d5dfe235f66cf894dabb42b6b2cce18a3486fb1
font_01_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 10596 bytes
SHA-256: fcb8c40d829687c0668a26dc0f7bd9b58819da7596e7d455ff02dc58f5bfe33d