Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c519daaf7cf4f60…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 02:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2521e82191b7812aac63bf7a7eaac860 SHA-1: 0af005986f5093aff7816774cec75b33c163fc98 SHA-256: 9c519daaf7cf4f600d25f6eec165acb997bbb59292bf930f181ced4e091438ba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The primary malicious URL identified is https://baarspo.ru/strik?utm_term=checklist+manifesto+pdf+online, which is likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=checklist+manifesto+pdf+online PDF link annotation
    • https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/6110125.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/liwozutapat.pdfIn PDF document text
    • https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/b7ab0cc6fadf7a.pdfIn PDF document text
    • https://lonomunemol.weebly.com/uploads/1/3/6/0/136082408/tawajekedo.pdfIn PDF document text
    • https://rokumipizo.weebly.com/uploads/1/3/0/7/130776068/tozipo_peduxunuwojav_maboletutasot_zorobo.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/pezerapufozowo.pdfIn PDF document text
    • https://murufafutebe.weebly.com/uploads/1/3/4/4/134473477/ruvopuzotop-kuxeliwo-sedamibidop.pdfIn PDF document text
    • https://zogozunenu.weebly.com/uploads/1/3/5/3/135399222/c9eaa6ba8d930ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9279b3b1-184f-4ee0-b4aa-f438d1378775/jajefezovujikulogamuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1441232a-7858-4365-9614-793b49bc317e/kowugowedisojofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18558425-4907-41aa-a260-cdedf577f643/lukuxibaxevonigadawijes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6baf7bf5-0bb5-46aa-9453-598280ba62fd/21292043497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1670ad4-70ce-4ea2-bded-7aec7b638103/mitadewuwesozage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d829c98d-e678-4d97-98de-3380abf68b74/lugisakezason.pdfIn PDF document text
    • http://ludujefu.epizy.com/feralowegume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e54764-a3fc-407a-9f81-7588affb06d9/can_you_get_new_battery_for_kindle.pdfIn PDF document text
    • http://wotekobadukabuz.rf.gd/alcoholes_y_fenoles_quimica_organica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de93715d-8ce5-421a-88ed-c448e3912e04/how_to_change_sky_q_channel_without_remote.pdfIn PDF document text
    • http://dubobosijube.rf.gd/ds_assistant_synology.pdfIn PDF document text
    • http://memaded.epizy.com/8174557881.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_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 5268 bytes
SHA-256: 03d0318b96ee757d33d67eb6be991216d0236c4d22aa15b6122354e9b31341ad
font_01_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 10400 bytes
SHA-256: b37d33ce1cdf1d0aada84b52857e72864b0bfccae8141094c38cdfaf29200f8a