Malicious PDF — malware analysis report

Static analysis result for SHA-256 c168dc2db8b49737…

MALICIOUS

PDF

81.3 KB Created: 2021-04-30 03:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3f433962968148f3d0e92023e54c550e SHA-1: 90aa5def9bc97b9cb92ca61b870d13412207d242 SHA-256: c168dc2db8b4973786e399b6cd56a1c0083414769c8aaf25694f326b88cc6ab7
126 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 phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to financial portfolio evaluation, likely intended to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+evaluate+a+mutual+fund+portfolio PDF link annotation
    • https://cdn.sqhk.co/sesudegaruta/oDSSkQL/alley_cropping.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/jlsQ4hc/rizobazepixubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5ff0be60c0104.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/MheYidy/kendall_and_kylie_park_combat_boots.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/nejakimemisoximiba6zmz.pdfIn PDF document text
    • https://wodelegijulafa.weebly.com/uploads/1/3/4/6/134677223/37e56c25ec.pdfIn PDF document text
    • http://geekcods.com/53736686642xpfl1.pdfIn PDF document text
    • http://nivawegokex.22web.org/2661570828.pdfIn PDF document text
    • http://goshop32.site/racgp_computer_security_templatesp5vb.pdfIn PDF document text
    • http://meetchat.space/rorozekomimajerare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_606008a6e0a2b.pdfIn PDF document text
    • https://talibixakezadep.weebly.com/uploads/1/3/4/5/134590085/8793693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2632d5eb-2c0f-4f24-ab18-6a5a7ce429dd/teorema_de_moivre_laplace.pdfIn PDF document text
    • http://jesogini.rf.gd/emcee_guide_script_for_christmas_party.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89360179-c35c-4de8-8df8-efec28137f78/sugokebuwu.pdfIn PDF document text
    • http://piwiweranewu.rf.gd/adding_integers_with_counters_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 5004 bytes
SHA-256: 091356e18faead97ccc332fbc79ecd99fd038674a1b9661420b93dc2470e020f
font_01_sfnt_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 11256 bytes
SHA-256: 222ee8eebac0dae7cb7ff679a71f0317a480a2abc5895fa16388e834bb341e8e
font_02_sfnt_off0001299d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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