Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3a7abb2564ca5f…

MALICIOUS

PDF

77.1 KB Created: 2021-01-28 01:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 609fc1f6f57919e64dbcd405ec38a32a SHA-1: 31fe6c3ae94954275db210cb0d3adf49a4fed1c5 SHA-256: cc3a7abb2564ca5fd4ff9cafd06fb391405978cfe4271888a4da41a6d705157c
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=stoney PDF link annotation
    • https://cdn.sqhk.co/jobiwokojo/XhcwTge/xbox_one_open_beta_cold_war.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_5fe912d8d0fa7.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/jd1OijM/mermaid_wallpaper_hd_for_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_60072439d8ac1.pdfIn PDF document text
    • https://cdn.sqhk.co/nurafurofopu/pggggr9/sunukavufujuxoruderexum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5ff2bd608196a.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/wmjiq1f/ps_monthly_games_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/iaIpgij/wixerujilu.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/rsHhajf/pawafirekufedozozepine.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/FgeHQ2M/53612560430.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/YphbIhj/recharge_net_pack_from_main_balance_airtel.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/j5mSppn/best_fps_games_for_nintendo_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/IieohhK/xawowaroved.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387406/normal_5fcad878d583b.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
    • http://peronilekovo.rf.gd/virelavabejebufidemowuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/securecrt_windows_10.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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 4984 bytes
SHA-256: 006f7c70dd02ff34bba21c43d56c9b261362954b9a3ce074c7fd332ecd159082
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 11160 bytes
SHA-256: a1d0dbb9e872f9c8708a4769874ec56a84ceefa2d3a39ad56371eae96e7731e1
font_02_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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