Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d2bd4655c82d88…

MALICIOUS

PDF

68.0 KB Created: 2021-02-16 11:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cd76e9e0ecd0d4d9ff3133c1ea86f339 SHA-1: 679dc4cde897c7a46787bb2cca2e6ae54ecf6ec4 SHA-256: 13d2bd4655c82d88d21c8638b3262b90f9a3b3e595da97f7bacfcc0d4120d8b8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wb?keyword=encyclopedia%20judaica%20vol%2021%20pdf PDF link annotation
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/kudula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495387/normal_60032d68b247a.pdfIn PDF document text
    • http://dobikan.22web.org/juwuxe.pdfIn PDF document text
    • https://dokurawufiza.weebly.com/uploads/1/3/0/7/130739275/vulapatorakewinomu.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/745f7490ae2e7.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/kavidupatu.pdfIn PDF document text
    • http://shoop-fk.ru/48216137572e0f6t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/somamere/mozilla_firefox_app_for_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/modal_verbs_obligation_necessity_and_permission.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/dijemirafagifebemu.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/wings_of_fire_book_13_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/26318152011.pdfIn PDF document text
    • http://koxapotunusoj.epizy.com/pukiritilevimoro.pdfIn PDF document text
    • http://kudawugijamino.rf.gd/colombo_tourist_map.pdfIn PDF document text
    • http://refowokewip.rf.gd/formation_adjointe_administrative_laval.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_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 5252 bytes
SHA-256: b4659ac185db67d7ccc408fcf0d97ead76498d885fc44da9107e6eaaec3eec32
font_01_sfnt_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 11384 bytes
SHA-256: e611176624bfe39918f82c12c689dd4092e209768140b5b3c524d4e35bf23a34