Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acb8781bfbe4ff2…

MALICIOUS

PDF

63.3 KB Created: 2020-11-10 11:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 641381b37b0f63a195b572163114c1db SHA-1: 1a72cec4fcc135c1ee88af2c2465c7b86dbb7cb8 SHA-256: 8acb8781bfbe4ff21c15c37656b7e8e08625523ce622c5487a32bc93da64aaa5
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?keyword=roxy+theater+camarillo+ca+showtimes PDF link annotation
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/kitoxukuxovu-visuvizutepunup-vanirofemize-vovosokivasomad.pdfIn PDF document text
    • https://rofipufexorijol.weebly.com/uploads/1/3/4/6/134656377/2545886.pdfIn PDF document text
    • https://nizowidupisex.weebly.com/uploads/1/3/4/5/134502208/nawurorino.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/c08a76b7-663c-47d8-9702-d0c199d72d01/65872754997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c298052-fc2f-4199-885d-4195f256b7c4/rabogozebadusogulevozal.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/58990676173.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/jawuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea649685-0e5a-4858-88c8-b0ee5e59b3ab/coin_master_free_game_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/acsm_health_related_physical_fitness_test.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bioenergetics_mcqs_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9997812c-0609-4631-bfc8-d358b5890cee/first_conditional_exercises_advanced_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dae9b7c-7b04-4872-b2b9-3dfbca5c43bd/peewee_longway_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9971d3-0347-4eee-9fd8-783875e179dc/woman_at_point_zero_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38e495d-be8f-4be6-831a-856c2b88c756/pozasonoraxuki.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/67800707289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9811227-ec8a-428e-b507-05b3dc0c12fe/29035942725.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_off0000aea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 4988 bytes
SHA-256: 832045aaa25e708d73607f846e2fd8f2855de89aadf6c42f2d9932059685b8d0
font_01_sfnt_off0000bfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB2 10116 bytes
SHA-256: 02e70101150219ea10b6b9db3a7fbabbfd777cc420732cc2b7b6408f0f77e5c9
font_02_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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