Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff872b8b3306bd43…

MALICIOUS

PDF

70.2 KB Created: 2021-02-21 22:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d838ac1eb5172683a2e0d44e5f5d7c6b SHA-1: 1e02c56548b85721efe0faebc272f0ad07873dac SHA-256: ff872b8b3306bd43a0f2f012254d8171bf828ab43f6b6597429eb58e7c5161a0
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/123?utm_term=hp+laserjet+p1102+toner+cartridge+price+in+bangladesh PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/GjczEL5/limorilu.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/sefenos.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/28227435991d7le4.pdfIn PDF document text
    • http://termometr-medikal.site/48887428226ipjiu.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/gAv0ic7/real_forest_live_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/lhfUT8Z/genuwefimomotavadapube.pdfIn PDF document text
    • http://ca-management.website/best_year_yamaha_yfz_450irx0r.pdfIn PDF document text
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/fuwatukazelow-kepugikikola.pdfIn PDF document text
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/6734448.pdfIn PDF document text
    • https://lezogifivejuz.weebly.com/uploads/1/3/2/6/132682585/1453121.pdfIn PDF document text
    • http://titanof-filtr.ru/girogezini7txcb.pdfIn PDF document text
    • http://mnatural.space/fipudugonapk19c.pdfIn PDF document text
    • http://nigasheff.xyz/paint_tool_sai_1.2.5_full_downloadtlv0x.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/4zggfRm/stay_alert_stay_safe_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/b0icrMP/summit_racing_gear_ratio_calculator.pdfIn PDF document text
    • http://antinomi.design/32055893135cpzdz.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/ugjG6ja/railroad_tycoon_2_economy.pdfIn PDF document text
    • https://xifabaruwene.weebly.com/uploads/1/3/0/9/130969291/lusigo.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_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 5840 bytes
SHA-256: 99bf1415d5fe7572ab8d11b542ac67b5177d109836dc0d537a0aeb2ef79c2212
font_01_sfnt_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 11124 bytes
SHA-256: 1c222e3d3f5a947d685536035452ed42e076e448e4783240d07fdff2a6282cc6