Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dab71c016099e7c…

MALICIOUS

PDF

80.4 KB Created: 2021-04-15 19:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2c325c1c2153fd64b6bb00673c6d9b7d SHA-1: 7381a712c87997a6d2148a6c492b22e108fc25e5 SHA-256: 6dab71c016099e7c48e5052f960208a4b90f5b5d5cef0e68946438a7a5d1328b
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, https://jottigo.ru/strik?utm_term=the+real+christmas+book+2nd+edition+pdf, is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=the+real+christmas+book+2nd+edition+pdf PDF link annotation
    • http://a-trvl.ru/wupiponitisizovqigfv.pdfIn PDF document text
    • http://laura-egorova.ru/20121693778s9cda.pdfIn PDF document text
    • http://bonmarket.site/what_caused_the_90s_economic_boomkhdlq.pdfIn PDF document text
    • http://odemebayisitrafik.com/country_line_dancing_steps_sheetstgvig.pdfIn PDF document text
    • http://dikuziropuviv.22web.org/caracteristicas_del_modelo_biopsicosocial.pdfIn PDF document text
    • http://verezitabel.66ghz.com/siforujipu.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/c7200410-9b0e-4d41-92c5-692025dfaa4d/82400139535.pdfIn PDF document text
    • http://toxuwer.epizy.com/7567298672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b07dfd-296a-4b76-afcb-27f7858e2b68/watch_the_pit_and_the_pendulum_1991_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1187559-92a3-47e8-9ae1-65ba39dcd3e7/what_is_the_arabic_word_for_yes.pdfIn PDF document text
    • http://ferodibev.onlinewebshop.net/zokipumapetuzebexo.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/18445256656.pdfIn PDF document text
    • http://betakudo.atwebpages.com/80797948408.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_07f897368bd943cfb3555b936d858a22.pdf?index=trueIn PDF document text
    • http://mapureju.epizy.com/javowivebojabuz.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_74c23a46a4024455bade5fa528cd58e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62997a4c-1276-41f3-8f14-6f29704d7688/78517632008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44b6a1d-7191-4cab-aa99-7bebd43cb552/what_is_wordpress_hosting.pdfIn PDF document text
    • http://jerasopel.epizy.com/will_directv_replace_my_remote_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9058779b-4c8e-4803-8566-50e8a93c276b/printable_decimal_place_value_chart_to_thousandths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d8c32e-7202-4d05-b9cb-2ff7f0705517/how_to_learn_html_and_css_quickly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b570cc-1d14-48b2-b895-644cdfa32bcb/86471222148.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_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 5680 bytes
SHA-256: cf77018838bd66def97adb2befae0e027c762c422f72e2286898b3200e4357f0
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 11076 bytes
SHA-256: a2dcb90e5e64c483daa94c299904bc0349c24aced04cf44095d6c3009cbfa1bb