Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e67651f01455921…

MALICIOUS

PDF

84.1 KB Created: 2021-04-05 12:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9c0c200fccd82ef9df13abfc99642a25 SHA-1: 25c6eaef3e33d5062c6a02e4780f8aa006c708d8 SHA-256: 5e67651f01455921efba5cfc1953b8f8b01ef3bfff0ce3cfb30fa634f81ecb71
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The PDF's structure and embedded content suggest it's designed to exploit user trust, possibly through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://leonvi.ru/strik?utm_term=fender+mustang+20 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463009/normal_603b3b1cadd5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_601f1dbff3173.pdfIn PDF document text
    • https://ruzizoradum.weebly.com/uploads/1/3/4/3/134317959/72938.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/rofumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_6019bbce48dbc.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/raxakizogum-nesukibo-xokorajesazos-komojojetufon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389365/normal_5ff0d564a0ae7.pdfIn PDF document text
    • http://luranowebereni.22web.org/analogy_practice_test.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/7198a178-3f46-4ef8-9eca-57ef4bde5b05/xiwasiwumisak.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_14c031b59b7f433bbcd3a3b550c8d819.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/713df266-cff8-4df3-bc38-cdcc5f80b099/sodastream_refill_price_target.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/maytag_quiet_series_200_dishwasher_filter.pdfIn PDF document text
    • http://duwawadava.rf.gd/55164666410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a80d79-3663-445b-afa4-d1479fa2ffa4/29976484284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26adcb05-98ca-4e18-9e53-e82c1cb56864/nikon_d5200_price_best_buy.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_fd6c02f7e96c41e19e3b4ce0f62d9f4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/gijemujalaboxopi.pdfIn PDF document text
    • http://wotujemun.rf.gd/use_of_etc_in_formal_writing.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/block_facebook_on_chrome_android.pdfIn PDF document text
    • http://kiduxoz.epizy.com/88102043066.pdfIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_db5c62e740b64993aee640c814366971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/precio_de_gps_garmin_nuvi_750.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_8c9f25ecae7c492d98d86ddf41e9ee65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/pdf_editor_merge_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2759725-a608-4114-9c36-9191dc28d8fa/oraciones_de_verbos_irregulares_en_ingles_pasado_simple.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_71be0ba26eef40e2bf2c9c3a7cb97388.pdf?index=trueIn 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_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 5344 bytes
SHA-256: 801560ec5e4b36b09f90b4f90715bb009f8fbeb572b759ceec70d79e9989dea8
font_01_sfnt_off00011dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFF 10784 bytes
SHA-256: c9914e55b8226787accdb2bb0fb5c321c39b1c27ea3f1fdfe5e54da4728ec5ae