Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1be9ded5a66a5e1…

MALICIOUS

PDF

83.6 KB Created: 2021-04-26 14:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e9a2f8c46402a48fd57f782a9a71150e SHA-1: bb886b0e0130d55c31fe597587c896d2eae3cd4a SHA-256: f1be9ded5a66a5e105a63120db907b72b4dfa62b9b58d1916bb083dbab07e9ea
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+do+i+change+the+battery+in+my+dsc+alarm In PDF document text
    • https://cdn.sqhk.co/fadejiweruw/QgdxGgi/receita_de_glace_real_para_bolo.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/eRjcggX/microsoft_flight_simulator_x_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/hgf2mhg/woodbridge_apartments_wylie_tx.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/waring_pro_professional_deep_fryer_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/hghgd4J/qello_concerts_by_stingray.pdfIn PDF document text
    • http://vivoxasoro.22web.org/weriribupafove.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/moxitaweruwomejegiros.pdfIn PDF document text
    • http://vikidavilor.22web.org/24537048256.pdfIn PDF document text
    • http://movoxazukum.22web.org/45646332371.pdfIn PDF document text
    • http://zepetolo.22web.org/sodezizokegulixoseruf.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/MTRjbgj/define_mercantilism_in_world_history.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/MiesZjg/mercantilism_apush_period_2.pdfIn PDF document text
    • http://febiterozoz.medianewsonline.com/xg_blood_group_system.pdfIn PDF document text
    • http://fudopanazi.22web.org/82639910368.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/djj2geJ/87539467655.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/8jeKgjC/junior_project_manager_jobs_denver.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://bepogakebite.epizy.com/fraction_word_problems_5th_grade_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96723aa-3a64-4866-ab01-95c3e2563574/belixawotaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ad69eb-a890-4807-ad0d-da542aeba5d1/how_much_is_yamaha_r6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0ed821-c195-416c-a473-b848ab80fb8c/best_3_ton_floor_jack_harbor_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ef7090-45f9-4882-a99f-8289fc3a9328/bajagag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d3903b-92b9-4ab6-8d69-fef0e7a12b9d/how_much_do_mcs_charge.pdfIn PDF document text
    • http://fovemotalulefil.rf.gd/67872138330.pdfIn PDF document text
    • http://vupiwenuwog.epizy.com/myeconlab_homework_answers.pdfIn PDF document text
    • http://gijenuja.epizy.com/vawuj.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_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 5436 bytes
SHA-256: 767f2c9519f8e66d738dd0602aec78bb7178c0cdc628597f7b3532e332c50aac
font_01_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 11320 bytes
SHA-256: 823619c084776f72dbcf8c917b070dfd2331650d59552d4932c660c35797b732
font_02_sfnt_off0001324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3