Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e17a741f06a5be6…

MALICIOUS

PDF

91.9 KB Created: 2021-05-25 21:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fc60291a624557380cb00b3e51094037 SHA-1: 46045b930cd81e848187de185905fc55489cc8a0 SHA-256: 1e17a741f06a5be6483622acb9f9118d7f318646160a2fb479434c613f0b7200
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a deliberate attempt to create a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=personajes+principales+y+secundarios+de+la+novela+el+caballero+de+la+armadura+oxidada PDF link annotation
    • https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/xolixoketanota.pdfIn PDF document text
    • https://gutamigev.weebly.com/uploads/1/3/1/1/131163772/5f199b7da90613.pdfIn PDF document text
    • https://jezaborerokifev.weebly.com/uploads/1/3/4/3/134392790/jilamon.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/598130.pdfIn PDF document text
    • https://sorebupewuf.weebly.com/uploads/1/3/4/4/134447244/7280445d0.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/12ff8bda.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/jagotudix-kupunase-gijupane-nixogete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d90b599-2a1b-42a0-81ef-eb921c16820b/24876300847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef00ffa5-31d7-4cfc-9a60-abe65514024a/zosonepalamep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57baad1f-d26b-47f7-b566-76b72a9ec373/what_is_the_top_selling_beer_in_the_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/7190203764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c1b138-c6d4-4ab1-bdb9-80a1f57d838f/the_magicians_book_2_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438cab84-1f43-479a-9a87-2135887515d9/rebexekubasumeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9ea70b-aa28-4cf4-a29b-bc4d0a4c62c5/28696318915.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/1996_jeep_cherokee_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/21497189118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c65654-ad62-40a4-ab39-9d95ea552ed0/what_age_baby_einstein_jumper.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/11318394634.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/46347535865.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/where_to_buy_replacement_garmin_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9758fc63-114d-4427-9b6a-66d9de556640/how_do_i_do_an_image_search_on_ipad.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_off000126ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EC 5664 bytes
SHA-256: a1b549ce694ce1cbc549463d3ace0d06a528e6797bc8227daaca9a318c469422
font_01_sfnt_off00013a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A26 11980 bytes
SHA-256: b332f1dc73d781a30ca71696e2605b709ab5a2b4ff9721b6fc717a0046960d84