Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcdfd3858d4eacc…

MALICIOUS

PDF

80.3 KB Created: 2021-05-05 21:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 048bdaeb3362b39adb3dd28a4974e673 SHA-1: 61f02936098c716009fd9237787bfa905cfe04fc SHA-256: 5fcdfd3858d4eacca007908cf240c3bcb94417eb78043c102e102cbe8445fb14
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary heuristic identifying a link farm designed to host multiple PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though truncated, suggests a lure related to 'calligraphy workbook printable'. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wb?keyword=calligraphy%20workbook%20printable PDF link annotation
    • http://wersita.fun/928394336rmis1.pdfIn PDF document text
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/fasikafen-wurutat.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/30065578271.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • http://balifruit.com/sirobajiraminowadobarifkz8vl.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/psicofarmacologia_victor_uriarte_desjv7eb.pdfIn PDF document text
    • https://punofusa.weebly.com/uploads/1/3/2/6/132695323/gujoroxobik_watep.pdfIn PDF document text
    • https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/xikebobikulixo.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/dyson_dc23_animal_replacement_parts.pdfIn PDF document text
    • http://belplitka.ru/dvdfab_free_download_full_version_crackrsetf.pdfIn PDF document text
    • http://cabinetshub.xyz/epson_wf_2540_printer_error_turn_power_offcwxvh.pdfIn PDF document text
    • http://raisinsapp.club/buxifujufedifaduqtzhn.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/49d1d14c07324.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/zaxefemebidaz/88291124031.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/shimano_fishing_dealers_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/59406301088.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/xevijipoxoxufinezewinekaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/redoji.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/odia_new_album_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/ejercicios_de_limites_indeterminados_resueltos_por_factorizacion_paso_a_paso.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_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 5112 bytes
SHA-256: 0138b67b9589293ad83999639e19fff0e16dfa6c3652fb40b85e491f4619db05
font_01_sfnt_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 10712 bytes
SHA-256: e4125dcdd5e7ae4dfc19ae7d386ffd4316cdb923cdd11b7eb7ab742eb6ab456e
font_02_sfnt_off000125e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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