Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac57944f1810eda…

MALICIOUS

PDF

72.0 KB Created: 2021-03-28 17:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1229a26c3f279050dd2323997ba6f343 SHA-1: 98d8b5fe8a97a2893759e5a89ced2195bc538c2d SHA-256: 5ac57944f1810eda11898836ba1f7f3fbf6eee791220d5323469ebed2542c705
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to a potentially malicious domain (kuzutuzo.ru), suggests a phishing or redirection attempt. The document body, though heavily obfuscated, contains keywords related to ethical hacking courses, likely serving as a lure.

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 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.
  • 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://kuzutuzo.ru/123?utm_term=certified+ethical+hacker+full+course+pdf PDF link annotation
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/manusukalilupi-tebegezuji-kakezodoliwezi-wakozi.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/sorepemupe.pdfIn PDF document text
    • https://nobawevedidilut.weebly.com/uploads/1/3/1/3/131379382/fejetuliwitok-kaguvimi.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/37636537647.pdfIn PDF document text
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/3925022.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/gateme/human_anatomy_and_physiology_10th_edition.pdfIn PDF document text
    • http://vokuloramemi.epizy.com/xirojipitakimogo.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/30339590414.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/hp_envy_4500_printer_inkjet.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/teninutitedegofutolisu.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/46355867365.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/melaj.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_3b3955bfb4154cf0bf3608afc020698c.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_4e87d8b15b574bad90cd695ceb4d545a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/b._o._a._c_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/goxoxifujoxiluvuvosalu.pdfIn PDF document text
    • http://vitusaw.rf.gd/89619793229.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_894ebb5fb0264eff94ad2be05cd69e3d.pdf?index=trueIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_bda3d64921ee4587b60c1793004af9e3.pdf?index=trueIn PDF document text
    • http://fepusum.onlinewebshop.net/wiwebetolifo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7A 5212 bytes
SHA-256: 5b5cc37ee47429c5a02b25b0ae803d908f58a1f43a5eef4c55ff945da2d01849
font_01_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 10812 bytes
SHA-256: de37709827584704a65c22d7d3e34c3d1ed5b7050190c8a6c472c58b732e2ff8

Open this report in the interactive analyzer, or submit your own file for analysis.