Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f784fa77b5bbf5…

MALICIOUS

PDF

67.8 KB Created: 2021-02-07 11:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 77c3403cc2824f6cf09a961dc9494002 SHA-1: 305724ba479d752ecb92dc011b4df0644295df32 SHA-256: a4f784fa77b5bbf5842d94defdf7c0c87a617c125b7ffd7b1ea7fe574d174eba
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://yafferge.ru/wb?keyword=bang%20bang%20tamil%20movie%201080p In PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/4836623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_6008cf594b0bb.pdfIn PDF document text
    • http://tonopexoni.22web.org/golobuwewemumonej.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/660bfa872079.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/af085ee45b02f.pdfIn PDF document text
    • http://xexogafuko.22web.org/gozajipigof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414352/normal_5ff5cf0b97512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5ffe7b914fd96.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/memasexojun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454558/normal_5fdf66a1e6e8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunizifafam.epizy.com/72291319326.pdfIn PDF document text
    • http://kusofiwu.epizy.com/savodegadufex.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/rojuwopidarafavadefuniki.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/biluxuliwuvorelesu.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/en_liftares_guide_till_galaxen_film.pdfIn PDF document text
    • http://kopivenegi.epizy.com/22935609514.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/46814980612.pdfIn PDF document text
    • http://javajese.epizy.com/55909389050.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_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 5504 bytes
SHA-256: 613344fdf964e3e1c0fee37147c03e3b52e835df0bccc42e49b083d963afd469
font_01_sfnt_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 11860 bytes
SHA-256: 5744b448d7e103da35d716514dae5d25b0e91f93c5e50fd50c65827ecd28ed46