Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bf19292f798675…

MALICIOUS

PDF

69.0 KB Created: 2021-04-03 20:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96b931b8dc9ec51163e6be456b73077b SHA-1: 0935a5749ac55d46b4eb81753f3109c64489d8a6 SHA-256: 47bf19292f79867543d513d427683cd6628a79e1c4690a5a96d9b4470c080dab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://zajinet.ru/award?keyword=adolescent+health+questionnaire+pdf PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/zGC9hg9/cover_orange_player_pack_level_77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_603b05a7d5efc.pdfIn PDF document text
    • http://xelapelumu.iblogger.org/android_studio_splash_screen_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/Ljh2hhe/81190776520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5fe983481943c.pdfIn PDF document text
    • http://virenoveza.22web.org/siworuwusa.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/34096558265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_601b912259518.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/the_accidental_prime_minister_book_in_hindi_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/5Ajj9jh/cara_berhenti_berlangganan_paket_gimmick_dunia_games_telkomsel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_6060d9a20ffa7.pdfIn PDF document text
    • http://zajodas.iblogger.org/bwv_1052_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/jhgg9gj/create_my_wiki_page.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/u3jcygc/xivuwimasiso.pdfIn PDF document text
    • http://xixapewazawa.22web.org/psychological_assessment_test.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/76359730301.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/7da0cd9e-3eda-4189-a896-d3e2e9d3a810/17770002314.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/63332942247.pdfIn PDF document text
    • http://kagabefusexem.epizy.com/sipanoxozikexomebilu.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/castle_used_in_robin_hood_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136f68bb-5533-4e88-af61-4a8d2f5e6f51/captain_underpants_books_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5cbbf9-afd4-4430-bcf5-c52630508a00/what_is_tr_in_crochet_instructions.pdfIn PDF document text
    • http://savoziv.epizy.com/62398495518.pdfIn PDF document text
    • http://nixitomo.rf.gd/midelawit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131396e1-84b1-44a5-bb53-383c8d67332b/9552083584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6335886-5e65-4dd4-b9ce-a7db68d9af59/25928626482.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_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 5360 bytes
SHA-256: 1a47e87eaf4170806aad9cf9c6699f748c416bad8d45b6483c35fe9bb0597838
font_01_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 10448 bytes
SHA-256: 0d2c6a39d224a19e2702deaa6690710bd985c4919ab3b1cc2b056a079d6a60e2

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