Malicious PDF — malware analysis report

Static analysis result for SHA-256 4360e0159d097748…

MALICIOUS

PDF

83.7 KB Created: 2021-05-09 06:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8e493ce95af3da7f2009748fb34963fc SHA-1: e8a548a703638d870ae9b0465987a9b1242f6433 SHA-256: 4360e0159d09774873553858f1a4d1674c89b892bebc7f153ca7d5b645f14129
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body's content, combined with the PDF_URI heuristic, suggests a lure related to 'El capital karl marx pdf'. No scripts were extracted, but the high number of suspicious URLs points to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://zajinet.ru/strik?utm_term=el+capital+karl+marx+pdf+tomo+1+siglo+xxi PDF link annotation
    • http://lnstagramsecurity.net/76421701486mst3x.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/srimad_bhagavatam_in_tamil_free_download.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/doranadakozeteme.pdfIn PDF document text
    • http://batmbatm.ru/twilight_5_full_movie_in_hindi_download_480p_filmyzillaoyx6w.pdfIn PDF document text
    • http://creditactive.info/furamidaliwafapalawivedqvxf.pdfIn PDF document text
    • http://nesobaka9.xyz/thinking_like_an_engineer_bookta09y.pdfIn PDF document text
    • https://jirafaribov.weebly.com/uploads/1/3/4/5/134599686/a51b6b.pdfIn PDF document text
    • https://modibabebala.weebly.com/uploads/1/3/5/3/135340426/9896167.pdfIn PDF document text
    • http://oyuncuxx.com/38662936856gle0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nenutufap.epizy.com/66654514971.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/jirusipu.pdfIn PDF document text
    • http://gakajitaju.atwebpages.com/1396804659.pdfIn PDF document text
    • http://worurekebisur.rf.gd/xedototokomir.pdfIn PDF document text
    • http://kunegozaribop.epizy.com/fundamentals_of_air_conditioning_system.pdfIn PDF document text
    • http://tuxavilewik.rf.gd/99582361033.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/national_action_plan_pakistan_in_urdu.pdfIn PDF document text
    • http://bixowufufo.rf.gd/26008885708.pdfIn PDF document text
    • http://gojetovumivet.epizy.com/twitter_apk_android_uptodown.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/76437867094.pdfIn PDF document text
    • http://bebinuvejaxate.rf.gd/javugajer.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_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 5616 bytes
SHA-256: e53d8178168bc540b9ea9334172373d413d7d22f876de911ea4f66305af96b1b
font_01_sfnt_off000118cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 12300 bytes
SHA-256: c1bde59a48557da75706080c052c4d9f41e4f284146bda1c21344e15cb4b9ccf

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