Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d9097010794fb9…

MALICIOUS

PDF

78.9 KB Created: 2021-04-25 00:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 93683bf00d3a35468cc28b4a38f2cef0 SHA-1: b586563c3a4f1540a28a6e5e2885064a037cc8d9 SHA-256: 13d9097010794fb9d1df7ac84c30b70f91611a97393fad5ee73c4930c3a615e7
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to Excel, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=excel+2013+create+drop+down+list+from+another+sheet PDF link annotation
    • http://chambrehq.xyz/ponawobwpvr2.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/iljdeii/ice_climbing_hammer.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/mepugazemog-xafofot-pisivuxitu-nifaxopowogeder.pdfIn PDF document text
    • https://cdn.sqhk.co/fegokirar/ulhcuY6/35840632424.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/lajudoronufa.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/tenon-sizamoxobipore-zesulaxisomi-sipej.pdfIn PDF document text
    • http://pesale.pro/electrical_engineer_salary_jacksonville_floridaazahs.pdfIn PDF document text
    • http://razvivatel.blog/804933415223stdu.pdfIn PDF document text
    • http://bupetud.xyz/79101296604e6xhn.pdfIn PDF document text
    • https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/a13b9.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/fuhWu7q/her_soup_iowa_city.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/1725848.pdfIn PDF document text
    • http://casserlabs.xyz/plantronics_c053_user_guideobbbh.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/08be7d66b80eb.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/gurilivavademot_jaxev_ravurekokinepu.pdfIn PDF document text
    • https://cdn.sqhk.co/molofagaji/dIjhhcu/apa_arti_colonizer.pdfIn PDF document text
    • http://neyroskakalka.site/how_do_you_fix_a_noisy_dryer_drumgdks3.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/2440689.pdfIn PDF document text
    • http://italywow.pro/takiviwotats2rym.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/KxVgdq0/historia_del_clasicismo_musical.pdfIn PDF document text
    • https://dulebepil.weebly.com/uploads/1/3/3/9/133999512/wuvudiregigev_mebabuxupabus.pdfIn PDF document text
    • https://wapolamezabez.weebly.com/uploads/1/3/4/0/134041225/litipewimebiva-lupomi-tipibipube-jiroj.pdfIn PDF document text
    • http://temilops.xyz/analyzing_categorical_data_worksheet9msu4.pdfIn PDF document text
    • http://new-leggins.site/introduction_to_java_programming_includes_data_structures_eleventh_editionkbyo8.pdfIn PDF document text
    • http://copyright-services-us.com/what_personality_types_get_along16w8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 6004 bytes
SHA-256: b875be40b0e01c3185b9f12b76490a1cf8fd0465dc95d26a2839aad34421a4c0
font_01_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 11660 bytes
SHA-256: 039cc29f0e7851154ef1febfbfd720f7171c8e77859e3a655285491ad92f0c0f