Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf11312ce12aadd2…

MALICIOUS

PDF

68.1 KB Created: 2021-01-27 10:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2c78cea5ea4b2f15e043e60179995451 SHA-1: 5d90f28ed728dd70c64dc2ff3e962276015e1b6b SHA-256: bf11312ce12aadd2331938789d612537312152697791dffef09e6a066a9fb8cb
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/wb?keyword=bts%20army%20girl%20wallpaper%20hd In PDF document text
    • http://titoto.xyz/tiraneworuzupifizepajomfp14.pdfIn PDF document text
    • http://wavokumad.iblogger.org/love_feeling_hd_video_songs_free.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/cf0d14b2f0a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_6007acace5efd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5fe3bb614e44f.pdfIn PDF document text
    • http://antinomi.design/benji_bananas_apkb3z9t.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/potofadatapu-rupipozaxaxoto-jixotizelefali-burekoliv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_60104f8e100e2.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/e34d0e13b36a.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/5d76af0f.pdfIn PDF document text
    • http://sandiego-podcasts.com/assistant_pro_for_android_23._33_apk_downloadawd0m.pdfIn PDF document text
    • http://wownatural.fun/4949467209sg3t6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5ff63522204ab.pdfIn PDF document text
    • https://fojexoduzasob.weebly.com/uploads/1/3/4/6/134693365/rozozelapokalefiv.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/bekatadowibepakudoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fe38669a8c6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muresapidun.epizy.com/manualidades_navideas_reciclaje_gratis.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/chemical_energy_transformation_examples.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_off0000ccc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC1 5616 bytes
SHA-256: 8e4353884993f23f5b9bbb01ac7da90239ac1d6e6d536f1bc486b1a0ea43019f
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 10544 bytes
SHA-256: d38707029bc8d77bf4fd6e7dcc4b599d389adb1ed1c970244b568d2d1c1aded8