Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2adb134a91df32…

MALICIOUS

PDF

76.4 KB Created: 2021-02-13 20:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 55cf949a4e4f5604e4701cb4b8316fb8 SHA-1: 6e86defbd4cf156cbb0860dcddee91b0dd0429a5 SHA-256: 4a2adb134a91df3265dc6ff375aaf68fbb15b67bf191be7cc6f6ea055e45172a
126 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
  • 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://jacksth.ru/wb?keyword=infective%20form%20of%20ancylostoma%20duodenale PDF link annotation
    • http://medicinfo.online/dr_lynette_buschbacher_military_histx1zz4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcbf99260c26.pdfIn PDF document text
    • http://zelopaqq.xyz/mikanoxezubaory91.pdfIn PDF document text
    • http://meetdouche.xyz/7372959989893fai.pdfIn PDF document text
    • http://ogranifruit.space/56215801753i1c0r.pdfIn PDF document text
    • http://smirno.life/tecnologias_de_la_informacion_elizondo_sarabia2rf65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465144/normal_5fe5bc1341ded.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/42207725090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477163/normal_5fd157da21207.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffe8029bce4b.pdfIn PDF document text
    • http://eu-study.ru/bilurizawuxamotepadiajr9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilutuve.rf.gd/gejunuz.pdfIn PDF document text
    • http://runoxujozu.rf.gd/buying_a_house_in_france_guide.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/structural_isomers_worksheet.pdfIn PDF document text
    • http://gedokimisizat.rf.gd/11113960196.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_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 5268 bytes
SHA-256: 49440eaf45c8c2ed7c3640b7382976eefa4f2b7e1866d5d67c791265916f64a7
font_01_sfnt_off000101a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 10360 bytes
SHA-256: 5d7ae29da5d912f62e018fe1e3a6b13ea4cf4e8654b60ecf35041cccad7f4b0c