Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb617afafa35d8c4…

MALICIOUS

PDF

62.4 KB Created: 2021-02-22 05:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1f60cfa01ab3eb81b90ccb393db38121 SHA-1: 51bfae60c21a41deaefc447ede2beb58aaec519e SHA-256: eb617afafa35d8c4c559643b87917a65052c84f95bd12da68efad5223d448681
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, with one heuristic specifically flagging it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://leonvi.ru/strik?utm_term=i+pilot+remote+pairing', which is likely used to distribute further payloads or conduct phishing. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests a redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=i+pilot+remote+pairing PDF link annotation
    • http://lajulufubugo.22web.org/google_chrome_app_android_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375503/normal_5ff1142977326.pdfIn PDF document text
    • http://xawexusinuzo.22web.org/wasijezega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5fc8c49a23bf7.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/xotiledonekitat.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/filmywap_war_full_movie.pdfIn PDF document text
    • http://trokot-new.online/38132839596j7vl1.pdfIn PDF document text
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/foserimoxoruf-panid.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/rixevozajixezos/togito.pdfIn PDF document text
    • http://jufazireti.rf.gd/ahir_image_hd.pdfIn PDF document text
    • http://pugatexekar.rf.gd/cakewalk_pro_audio_9_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/57458498320.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/hungry_shark_apk_cracked.pdfIn PDF document text
    • http://tefuwileb.rf.gd/fantastic_beasts_and_where_to_find_them_casting_call.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/24829629992.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_off0000ba58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA58 4900 bytes
SHA-256: 1d9f59062f8e0439022f70f9b25679dad2ce4931f3780fc631326fd465dff5cc
font_01_sfnt_off0000cae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE8 9804 bytes
SHA-256: 2d960ee3afe939c39c849e68bacd99ca753a13d1d59dd933f30c947d80c1342b

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