Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1e2447304f8ac6…

MALICIOUS

PDF

80.5 KB Created: 2021-03-05 05:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cdd8b75576990fa08a96343aff1263ca SHA-1: 785e0f2b36289e22a3142a2e2d04ff70f3eab6ec SHA-256: cb1e2447304f8ac6f7ade76eb38da5a9acbe66ea861bcb6d6629bca0085a00ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=snakes+in+suits+audiobook PDF link annotation
    • https://cdn.sqhk.co/dulemokel/hhehbgf/spiral_plate_method.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/woweb.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/710b5c7f.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/jgg59gi/king_of_kung_fu_fighting.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/5673004.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/national_museum_of_american_jewish_history_store.pdfIn PDF document text
    • https://cdn.sqhk.co/mimotulifoti/yVhiLKG/69266817228.pdfIn PDF document text
    • http://zedateve.mypressonline.com/o_come_to_the_altar_chord_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/anFhhVU/fall_race_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/fu5YUGP/speedball_screen_printing_kit_level_3.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/nuvevuwotakes.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://s3.amazonaws.com/mibiwivanetuj/login_hotspot_mikrotik_template_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bdf97f6-5ff7-47c7-814c-3eff04c026e4/20288669044.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_come_my_dryer_wont_dry.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/69644623664.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/tendinitis_aquiliana_tratamiento_fisioterapeutico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319283e0-8690-44d1-8a48-7f11fdf4859b/1383159241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae010dcb-b2a7-4d8d-b6ba-552b16536968/how_to_mount_samsung_dishwasher_to_cabinet.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/nufuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de52888e-b8a2-4904-b8ad-7eadc811efab/que_se_necesita_para_ser_un_lider_cristiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3941f4-ab84-44f4-9ed5-b4ab2d005f7b/vobeloramunoxogupisuzawa.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/81424841897.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/camera_black_and_white_android.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_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 4880 bytes
SHA-256: 113ab145547353d2adbbb7f14e97be1a5ead5033be1cd867c158fa8c7e3fd9cc
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 10380 bytes
SHA-256: 45f7eb6f7e26201e31e0eec0c4f238685f7861daf7fb867110abfddc2395f494
font_02_sfnt_off0001268e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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