Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5f1a936cfab616…

MALICIOUS

PDF

68.5 KB Created: 2021-04-08 20:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5a8f3abc39cce83920cf1c6c31ee7455 SHA-1: 305c895fcdf2e61c5d272f5dd531cb2cb1f2e3ed SHA-256: df5f1a936cfab6161ffa6a54449e8225b591ff34aff0e3025a85f624fa73fef4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'druttle.ru', suggesting a potential phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and the high ML classifier score indicate malicious intent, likely related to driving traffic or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=how+to+pair+motorola+verve+buds+500 PDF link annotation
    • http://asta-stroy.ru/67301804230d32ok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_6056a8888fbd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_6059daff78062.pdfIn PDF document text
    • http://firstreadersclub.com/idrivesafely_answers_unit_4eafn9.pdfIn PDF document text
    • http://mexicotop.xyz/how_to_check_business_credit_score_uk6ovbt.pdfIn PDF document text
    • http://sale50.pro/18336950100b37qs.pdfIn PDF document text
    • http://vivadoctor.ru/misd_course_description_guideflv8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490138/normal_603720c7d111c.pdfIn PDF document text
    • http://idealica-italiaofficial.site/xifegamubefojoi.pdfIn PDF document text
    • http://parhelifrl.space/metuxegagekazjp78j.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/mipeboro/myaccountinglab_answers_chapter_10.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/picsart_png_stickers_free.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_4eddaee6329e4683ae9d3b4af15b3a45.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_3267d598a2304600ae63468fd2411bb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/ayyappa_audio_songs_free_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/xuxabovipolef.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/dijagudajijuvevojasepune.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/css_selectors_cheat_sheet.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_6e8d7eb094c142469f1722fdd3ce4f13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/5086197659.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/viper_alarm_system_remote_start.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_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 5624 bytes
SHA-256: f47776ba5bf4939caa7102303f4350f3a958009361bf539946974dd1c811a529
font_01_sfnt_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 11020 bytes
SHA-256: eebc55612ac12da9ed688bf967dbab300e20c5ecf70f35f9c3dc1e1db529a7f0

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