Malicious PDF — malware analysis report

Static analysis result for SHA-256 703f7602166b95f4…

MALICIOUS

PDF

78.4 KB Created: 2021-04-16 04:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0be10b0f1aa2e47180484ff95c549546 SHA-1: e79a3d597f84801e1f271839fbb01d2a8bf480f9 SHA-256: 703f7602166b95f450babbadac446f3340c0f6ce2544382a92e8d6db0614aba2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, with a specific detection of 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The primary URL suggests a lure related to 'statistics for psychology', likely to trick users into clicking through to the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=statistics+for+psychology+6th+edition+pearson PDF link annotation
    • https://tuwunujanopir.weebly.com/uploads/1/3/4/6/134617400/ca7d87e.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/2CSnIhj/42560512752.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/hiSYij9/15352698047.pdfIn PDF document text
    • http://menesoger.iblogger.org/baby_shark_games.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/mepuwozevobalakivogixof.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/gThdLgf/21752069795.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/jiejhjf/tarijudol.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/jhggLja/15952518414.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/9y7zaoh/sci_fi_sound_effects_pack_free.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/warena.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/57737.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/coordinate_grid_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/4jgghid/raid_shadow_legends_pc_cheat_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/reteduze/HjgKhfA/upload_video_di_youtube_via_android.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/jiladozijoxukorud.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/back_to_eden_gardening_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/vhd4L3K/streamlabs_chatbot_not_showing_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/0ibjhlk/flippant_definition_francais.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufojigox/3KhhCjh/67710109938.pdfIn PDF document text
    • https://vejelajaluseno.weebly.com/uploads/1/3/5/3/135392022/3019699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satogitexuvo.myartsonline.com/garmin_map_update_free_download.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/dabemamuxalujijofo.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_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 5776 bytes
SHA-256: 7124bec9175c4623ce0b68dcf2f55764e7de1a48891d4691f7a07b528c9cc623
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 10796 bytes
SHA-256: f1a502fdc3367904c002662f598fa868bb5431dd076de7165f9ff977001fae0e

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