Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bf01b16b88dbd0…

MALICIOUS

PDF

88.5 KB Created: 2021-03-19 21:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1eb35d6b62ba907fc82d9a23f92b72a1 SHA-1: 5474d2d8f0864ac7739303fb4d5b1ece993ff872 SHA-256: 39bf01b16b88dbd0f376f1fdfbc3d600282d3a97967259f93f47f8e4b6de5af6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains embedded external URIs, with the primary suspicious URL being 'https://zajinet.ru/strik?utm_term=mi+planta+de+naranja+lima+cap%25C3%25ADtulo+1+resumen'. The document body is heavily obfuscated and appears to be a lure, likely related to phishing or scamming, indicated by the URL's UTM parameters. No scripts were extracted, but the presence of embedded URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=mi+planta+de+naranja+lima+cap%25C3%25ADtulo+1+resumen PDF link annotation
    • http://itactical.xyz/85923424459n6g3g.pdfIn PDF document text
    • http://glawerry.online/jefuwipipabusizobakn7cff.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/pazolevigevepopalulisuma.pdfIn PDF document text
    • http://dejamorije.scienceontheweb.net/rudram_namakam_chamakam_lyrics_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/rutuliduzo/hPeShcY/apple_watch_faces_series_3.pdfIn PDF document text
    • http://free-at.pro/petizewekofizivimajawanijwyl6s.pdfIn PDF document text
    • http://sberbank.link/python_requests_authorization_header_tokenyeaxb.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/J65hegg/learn_android_programming_online_free_for_beginners.pdfIn PDF document text
    • http://skameyki.club/manualidades_con_botellas_de_cristal9q7fl.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ghdnjdn/mpl_live_ludo_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8cbc23-fc8f-4a63-99d0-062aa72c80f2/95289374846.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/hypex_nc400_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/zipubikigojutabolinexow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60371bc-fc87-436a-a123-bf9245eab58c/53879678817.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/bakuti.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/simedolipepo.pdfIn PDF document text
    • http://lorasis.epizy.com/beholder_game_free_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/what_is_a_meeting_called_in_hindi.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/fujitsu_scansnap_s1500_connection_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d356294f-8152-4ef1-9634-061c337b73bb/how_do_i_charge_my_jlab_go_air_earbuds.pdfIn PDF document text
    • http://doliwoxebokuk.rf.gd/13917606383.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_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 5404 bytes
SHA-256: 5825c83525449168dcee47a5eb63d7a8876c6ccbfae515388c3b98825921d7da
font_01_sfnt_off00012dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAE 11140 bytes
SHA-256: 6c6b19324527e9b7b9c771881353fcf50c5aef4e91503d68e208c74bd4e95391

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