Malicious PDF — malware analysis report

Static analysis result for SHA-256 291acb8c247b2f43…

MALICIOUS

PDF

79.7 KB Created: 2021-02-02 03:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dda2f6be8c126e4e6a4493706328af89 SHA-1: 5fbb5e96cc030e2129159860a385c6d9ad372829 SHA-256: 291acb8c247b2f436b37c49714b3edf0e21621d60ba2fc9143e4bd8025feb81d
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://leonvi.ru/aws?utm_term=tecnolog%25C3%25ADa+e+inform%25C3%25A1tica+chicala PDF link annotation
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/govokejejogaziz-godeji-visod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483075/normal_5feca24c5f718.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/tobawekutax.pdfIn PDF document text
    • https://gebiralegesexi.weebly.com/uploads/1/3/0/8/130814020/8244869.pdfIn PDF document text
    • https://rilobajivevet.weebly.com/uploads/1/3/1/4/131438099/c2daea.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/fhhggid/dual_fuel_portable_generator_reviews.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/nagubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb3a05e69ab.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/darimozajaxanevanixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367921/normal_600873efa110c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5fd9fdaeda3de.pdfIn PDF document text
    • https://zezonusadife.weebly.com/uploads/1/3/1/4/131410479/xosekemuxemi-kemipekefip-guvelurukusakap.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/0RYjath/zarudedovotoxisafiwelozi.pdfIn PDF document text
    • http://repositorio.ug.edu.ec/handle/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vixoboguwexalo.rf.gd/attributes_of_global_city.pdfIn PDF document text
    • http://lewimidofi.epizy.com/45508593506.pdfIn PDF document text
    • http://jawafezirosozo.epizy.com/durability_of_construction_materials.pdfIn PDF document text
    • http://kepirodineloga.epizy.com/ashokan_farewell_piano_sheet_music.pdfIn PDF document text
    • http://fexajorijoworas.epizy.com/autotune_5_dll_free.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_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 5356 bytes
SHA-256: fb17418c200bfa03abb066e51c0f90ea60b93064f5c453584db79403b4e36a48
font_01_sfnt_off0001093b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093B 11780 bytes
SHA-256: b0664db5d5d5ff27696f4b853a6c480de8740ed28832f1c78b10fee9c8af5180