Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b271e1643d879b9…

MALICIOUS

PDF

108.2 KB Created: 2021-04-06 01:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d7f80b91ba75b65edda38e8f94206430 SHA-1: 799fe2556823c44c40227980daa590df6268cbcf SHA-256: 7b271e1643d879b976b6da4fbfe3877e3567e57f6ace528da9c874e12ac0a2e2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to payment and bank details, aligning with the 'SE_PAYMENT_REDIRECT_LURE' heuristic. The presence of numerous external URIs, many hosted on disposable domains, suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://druttle.ru/strik?utm_term=delorme+inreach+explorer+activation PDF link annotation
    • http://sikevemekoma.mypressonline.com/alter_ego_5_cahier_de_perfectionnement_gratuit.pdfIn PDF document text
    • https://wepebagelokej.weebly.com/uploads/1/3/4/5/134583559/8495225.pdfIn PDF document text
    • https://bosonelete.weebly.com/uploads/1/3/0/8/130873804/ecdd53e16adbaf1.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/puzekef.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/fefub-jamunivijo-rukisiwuvepi.pdfIn PDF document text
    • https://mebusogaduvorit.weebly.com/uploads/1/3/0/9/130969439/poxebizebipew-xetejuregil-fifatadawuragux.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/rexad_sabine_favama_mopez.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/what_to_write_in_a_21st_birthday_card_for_a_niece.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/44846096719.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/yniinhb/best_free_facer_watch_faces_for_gear_s3.pdfIn PDF document text
    • https://cdn.sqhk.co/gemesikexo/a0SghVJ/28627159803.pdfIn PDF document text
    • https://goxupoxujebab.weebly.com/uploads/1/3/4/8/134892745/69934.pdfIn PDF document text
    • http://mojofaza.mypressonline.com/94802636495.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/vihibot/how_to_bake_italian_bread_from_scratch.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/masimo_rad-8_pulse_oximeter_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/gerezowuves/eBREhip/contract_template_for_payment.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/9316537438.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/clasificacion_de_las_empresas_por_su_finalidad.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/7ca0d280-4c61-4a4e-83a1-67272a41eb31/saxepusidebegiroru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020bf5c7-152d-4242-b569-7558d592ce2f/xapexavovasirinilajagomiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584c14f6-cc5d-4014-a1e7-094b870d9b03/birikavugevog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54656f9b-3b55-4c0c-8a15-98bf93479cdf/vililoxepizovu.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_off0001694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694D 5120 bytes
SHA-256: 3cd9eeed6f2e41f2bca5df25501e775cc3b6a7844d72ec3f15c06e9f630df80f
font_01_sfnt_off00017a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9B 11804 bytes
SHA-256: 11e5d9a717af0fe0fc081fa24684222b1641800206634da4e92874300429722c