Malicious PDF — malware analysis report

Static analysis result for SHA-256 1663eee92d4aa1c7…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 09:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b5708b21d7341194f001bcaf23cf1da SHA-1: 26fd6053a7636e1bce23b10c92526d8cbf124f2d SHA-256: 1663eee92d4aa1c775ce6d484c8eb52f47f5549c816ceaaf0c302b4e19f5f951
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=a+court+of+wings+and+ruin+series+order PDF link annotation
    • https://cdn.sqhk.co/notizejamebo/ighhick/6375590005.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/rKWggjj/furia_de_titas_elenco_completo_dublado.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/jfjaplS/21543510715.pdfIn PDF document text
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/wajigegav_sizodapogux_seribolewi.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/iaicieM/bevamifeto.pdfIn PDF document text
    • https://cdn.sqhk.co/sisamide/VZ7hcL3/duck_hunt_game_free_download_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/03Lhdjh/battery_daddy_ebay.pdfIn PDF document text
    • https://jozurukezareta.weebly.com/uploads/1/3/4/7/134741488/16b9acc1025.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/jbicgdi/vagogesidenepobiwiguxil.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hgggc3H/train_simulator_ps4_review.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
    • https://uploads.strikinglycdn.com/files/7909ad6f-28ee-4fc6-ac65-e4246a600780/stephen_king_books_printable_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b27f0cc-9cdc-48ac-aa53-44e5af4fcc8b/dia_feriados_en_puerto_rico_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112f4d6f-f359-4fe6-b72e-e02f59bafeee/fisher_paykel_clothes_dryer_spare_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0447fc95-dc32-4a9b-8c8e-492131280c1e/cycling_merit_badge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2121fb11-8d43-4878-a3d5-892c740b30f6/what_are_examples_of_effective_communications_skills_which_can_be_used_when_consulting_with_others.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a7b9c0-ffb3-41a2-8ac6-1230bbc38ce1/kerarelujol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4401f2-2a6f-4a01-95fe-d2c7ec54de84/nujovenonakajotidamos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686732ec-b0bd-4e31-8e8d-d2dd0c6b6bc3/java_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab40b9d1-a002-4d6f-a96a-dcce67752111/sharp_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112278aa-43f1-4c32-8eff-5d06754f7107/nanajovoziz.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_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 5120 bytes
SHA-256: 75b354d4e85ce4c2c038af0f58f14faa4526d6b531904c400c8ec26d29a4d39d
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 10092 bytes
SHA-256: d7accbc393d5c7770fb4c472c84b3d12010d1810682afebdb38d05066e4e4aaf
font_02_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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