Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18ec94f22913fe7…

MALICIOUS

PDF

78.7 KB Created: 2021-03-15 21:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: deebff7bdc87ce01268363c30aa1acc2 SHA-1: 4a2abe38ee01022782336d126435fbbcb260767a SHA-256: d18ec94f22913fe77cb24f381d9491b8b3bcb2206026f104ef183f2683bb4fbe
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal it functions as a link farm, embedding a large number of external URIs, many hosted on disposable domains. The primary attack pattern involves directing users to these external sites, which are likely used for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the main indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wix?keyword=the+miraculous+journey+of+edward+tulane+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369771/normal_6042f61691009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_600c8de280f62.pdfIn PDF document text
    • http://cozyplacefor.rest/doduloro09egl.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/eMhetNq/mivebazavawabojimavumewof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458614/normal_5fee810dafd50.pdfIn PDF document text
    • http://cocobeautybar.ca/ias_23_questions_and_answerssljak.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/ehgjd0s/audiotool_download_track.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/a8HZijg/real_steel_boxing_champions_mod_apk_techylist.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hb1hdkE/best_heart_rate_monitor_watch_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/Sgjrkge/zajupinip.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/8jjjagd/poker_world_offline_texas_holdem_mod.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/how_do_i_program_my_fios_remote_to_my_soundbar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fc79aff6e249.pdfIn PDF document text
    • http://phulop.store/xezine4gx8n.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/1hcaja8/1572836664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_603d14e8d1c34.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ehelZ5v/nocrop_photo_editor_square_pic_square_fitted.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369307/normal_5fce08ec069c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fd627d12a86a.pdfIn PDF document text
    • http://konolux.medianewsonline.com/98420569051.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/54444233162.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/kjds4jj/78013787371.pdfIn PDF document text
    • http://hookup681.site/canon_mx300_wireless_setupkdvng.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/jeZfOjc/beautiful_babies_wallpaper_download_for_mobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telusomabufa.onlinewebshop.net/teaching_with_power_3_nephi_17-19.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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5612 bytes
SHA-256: 14fcfad40b6d244721a1eeb9d110173e80eac0e39413eed57842334c8cb2f64c
font_01_sfnt_off000104ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EF 11292 bytes
SHA-256: 166873f137386fe47baf94651d84878b86f63144761befd003e0bb98b497c5e7

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