Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7ad7dde4420bfb…

MALICIOUS

PDF

100.1 KB Created: 2021-04-01 21:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16dec052ad6cc1ea2517ee22f9e6d534 SHA-1: 5b786df383864f6ba7d7d5193ea327280c6fed63 SHA-256: 9a7ad7dde4420bfbbbdd6be04ffa8ddc12df18db8a8b3ab8282c41c02ff0f66b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/wix?keyword=arissa+-+the+wandering+rogue PDF link annotation
    • http://nout-prodat.site/zaxewiwolokepur524.pdfIn PDF document text
    • http://boldly-grow.com/arduino_315_tutorials7qcb.pdfIn PDF document text
    • http://yandex-delivery.cc/xezedadatucihm7.pdfIn PDF document text
    • http://uscovidcharts.com/57529759253h5m1k.pdfIn PDF document text
    • http://gufutaca5.xyz/322914661017j71o.pdfIn PDF document text
    • http://bred-enligne.com/does_the_2011_ford_escape_have_transmission_problems1yunp.pdfIn PDF document text
    • http://bachanalytics.com/lenivavomakijunk8k0s.pdfIn PDF document text
    • http://migerov.xyz/excel_format_cell_first_letter_capitaltw9de.pdfIn PDF document text
    • http://keepqifi.space/plantronics_backbeat_fit_3150_in-ear_true_wireless_sport_headphones_black_bluevks6o.pdfIn PDF document text
    • http://copyright-help-center.com/samsung_s20_device_care_securityory1n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5feb71b3d14cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_6032547ec1ca9.pdfIn PDF document text
    • http://bestcreditcheck.info/naxukebigigaypg7b.pdfIn PDF document text
    • http://vivadoctor.ru/danafajobureguvaxamoxas8c82g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_fae8d355ca464166a1b01e623ac10e4b.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_06a4884aad414a738c52ac127683d075.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ceabbb-9f3f-4cc0-b201-e5e62e8055fc/how_to_start_the_pilot_light_on_a_water_heater.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_6b7581416c60438d96278cdcaf44265b.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_70b5ec9db76846f08428f227fa54dd62.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_02a395ce7c5149d8a21d3632e7a97881.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/211156c0-db3a-49d9-9250-a16f6d366640/como_convertir_un_archivo_a_word_en_linea_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7ff792-345d-411b-af29-bbb044d99310/mubamejofodawuwunug.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABD 5168 bytes
SHA-256: 9ee5532ebcab630e2f9cf405b3fc7341b2bdee695880ad3df5d8e6c5aeda1c2f
font_01_sfnt_off00015c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C61 11316 bytes
SHA-256: 8435340810762944d7113b3d452f379855d7bc7b0031163a5f37add522b63a49

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