Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3a4f47f64bc133…

MALICIOUS

PDF

81.3 KB Created: 2021-02-13 13:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4745f3d4ce20bb192d14d9b8e731cf78 SHA-1: c711fc1227cd27fdc6bb1ee5aedded053a986e6f SHA-256: 1f3a4f47f64bc133d04b68282c0d9719d90fef4b67d199329951ba1feef2e9bd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=febrile+neutropenia+guidelines+nsw PDF link annotation
    • https://cdn.sqhk.co/xenudipu/fJ2rheW/tenafajubovebuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/cGGgfhr/the_wonder_weeks_book_6th_edition.pdfIn PDF document text
    • http://swiss-family.space/palayathu_amman_movie_song_masstamilangoale.pdfIn PDF document text
    • https://cdn.sqhk.co/nakokixega/jbs1Ugj/jiffy_lube_oil_change_expensive.pdfIn PDF document text
    • http://iranianvc.com/21940784547rkct6.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/ay2jikp/superhero_compression_shorts.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/xiaRuZU/solar_system_map_including_moons.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/iaIt2gc/97303858952.pdfIn PDF document text
    • http://design-kvartira.info/countries_involved_in_ww2_94_answersfrnmt.pdfIn PDF document text
    • http://bluetea.space/mdf_sheets_3mmdmp9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fe6aa5ac60a3.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/djdjuRx/33183014706.pdfIn PDF document text
    • http://bepebeku.22web.org/38105830372.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/gofapojogifuve.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/tUdKHhi/nenipig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 5312 bytes
SHA-256: 80694210295629f51895d9cfa71da1163886acbe30968bb9d370c414eb3063c8
font_01_sfnt_off0001135e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135E 10960 bytes
SHA-256: 4be09f762b5032463da1f918cceb4fa2c4ff489aa38c6fe720945689abd2cfa6