Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d5acf264ee29a8…

MALICIOUS

PDF

77.8 KB Created: 2021-03-08 11:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a2107d4d99737f9ea7084af398d0e5c SHA-1: 5695a5ae0edb3c9d7e66669878e5699b4d89702d SHA-256: 22d5acf264ee29a84975216e3fb608a680d99e555796fed09d115f9d26fd650e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=juego+de+cazadores+y+conejos PDF link annotation
    • http://riwaxutitono.iblogger.org/reduce_file_size_online_below_100kb.pdfIn PDF document text
    • http://wipababotuzuke.iblogger.org/la_flor_del_azafran_amarillo.pdfIn PDF document text
    • http://mibebar.22web.org/love_rosie_cecelia_ahern_espaol.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/lixasifasi/jugimobutosawolawisupof.pdfIn PDF document text
    • http://watekiz.rf.gd/myles_munroe_teaching_on_purpose.pdfIn PDF document text
    • http://fixetofona.epizy.com/how_to_use_accu-chek_multiclix_lancet_device.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/94429008724.pdfIn PDF document text
    • http://daxokefi.epizy.com/how_many_hours_to_learn_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/lutheran_church_of_the_reformation_washington.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_779eabf4247349a4851f87502f95e5d2.pdf?index=trueIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_ed95cb9eb6c94e9681d625a082f3f592.pdf?index=trueIn PDF document text
    • http://pamilov.epizy.com/21740900801.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_1e64f7756c1b44328cc222a0943a43d9.pdf?index=trueIn PDF document text
    • http://dikekonigexixa.epizy.com/lirafufopasoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/50784732372.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/kalnirnay_calendar_july_2019.pdfIn PDF document text
    • http://wuwopeluba.epizy.com/botepaxawasan.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/ejercicios_de_enlace_ionico_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/sholawat_burdah_teks_arab.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/actualiser_tableau_crois_dynamique_google_sheets.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_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5048 bytes
SHA-256: 4dfb65be3b3f9c4f2a97fdb232859857d0fce45ed93a923d7c3e5775d8adc96b
font_01_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 11364 bytes
SHA-256: 5c7b05a6c58d3326afa1209eeec1dfeb73385d621754bca8d592363cb67febd9
font_02_sfnt_off00011a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A62 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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