Malicious PDF — malware analysis report

Static analysis result for SHA-256 14787a9b53f98e52…

MALICIOUS

PDF

88.8 KB Created: 2021-05-26 07:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a48c463955cf13beba7818b074ef2363 SHA-1: 17bc3e395c6b2485f2ad971ed9eca8f71f8a5323 SHA-256: 14787a9b53f98e5201099dfc7bc4a8903944fc3bf598e260ca21528635a24973
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://baarspo.ru/strik?utm_term=hearts+of+iron+4+millennium+dawn+1.7.1+download PDF link annotation
    • https://zozijopese.weebly.com/uploads/1/3/3/9/133997316/7249772.pdfIn PDF document text
    • https://kefepifumadig.weebly.com/uploads/1/3/1/3/131383651/1810867.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/mevimijutitelir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_6062d005edb4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_60163cef2ed63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_602cd958af87f.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/51588c3.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/8360984.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/5924927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_604b76971a891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/chinedu_ikedieze_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2093d398-95a4-4a59-8f51-8b86954c9751/xugib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6382a5c-ca03-46ed-b1a6-bedae07c8542/how_to_refill_diaper_genie_expressions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b242336a-2747-4a55-9329-909a97b0840f/37808356454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c1277e-eb09-49f9-8b3a-72b468bfeb51/waxilibatisigadoruduni.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/dell_latitude_3490_datasheet_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2623a5-6171-4936-ad75-fca36aec28a0/a_suitable_boy_review_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/62774297896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d9ea4b-e937-4a1c-9e33-e2a834ae8f16/juz_30_list.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/vba_workbook_sheet_activate_event.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/jegiramivupejadakipogefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d89b95d-4b5b-4448-a36f-00e5ff6ceb26/xovuxovibizosikalena.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_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 5360 bytes
SHA-256: cd00b55d445d469ff8bb354fce2a518491742e5be58b2c8a60a525ecdbb3ea97
font_01_sfnt_off00012482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 15084 bytes
SHA-256: c35ee8882c67766dcfaf776116e47f9c26139b1f4a29233e79c346396cf4dd0f