Malicious PDF — malware analysis report

Static analysis result for SHA-256 b945c4605cd6cd65…

MALICIOUS

PDF

117.9 KB Created: 2021-03-22 17:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eaec62273f6c37a071e611732f26cd42 SHA-1: 916579ff44550bee0fccdc77f524fc3475e6dc08 SHA-256: b945c4605cd6cd650d863365b95eb169869f1940d56587f1747f9b4ef48bb265
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 0.9965

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://crophysi.ru/123?utm_term=amend+pdf+file+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476437/normal_6037edc0aff03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5fda528f0f2b8.pdfIn PDF document text
    • http://jamedoxeka.22web.org/2018_fda_product_packaging_label_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454995/normal_60032090d677a.pdfIn PDF document text
    • http://kovezemunoropu.iblogger.org/75197949050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5fd78e7202383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_60295f8b49bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_605819a8b25fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5ffb971253dcb.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/46066679126.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/maths_integration_formula_download.pdfIn PDF document text
    • http://sutobep.getenjoyment.net/asia_map_black_and_white.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fc831ea2c29d.pdfIn PDF document text
    • http://wupulij.22web.org/pafela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramawotinejog.epizy.com/switch_pro_controller_skin_template.pdfIn PDF document text
    • http://zabadiv.rf.gd/easy_kitchenaid_mixer_cover_pattern.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/jadual_kadar_caruman_sip.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/sozed.pdfIn PDF document text
    • http://tiliken.rf.gd/tik_tok_video_by_link.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/nunidixekogor.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/hp_officejet_pro_8610_adf_not_working.pdfIn PDF document text
    • http://jewugafi.rf.gd/93216693671.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/fedders_electric_engineering_ltd_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/40261935718.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/15683310842.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/55744804700.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_off00019074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19074 4788 bytes
SHA-256: c8277e96a22cce3eb9f37877912c640f58de567a97b86dc75351cc45767e1de2
font_01_sfnt_off0001a0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A9 11676 bytes
SHA-256: 439786dfac4656ad7d747bab0887a84ae27a0387ea927f3a7a04fe7f5562ac57

Open this report in the interactive analyzer, or submit your own file for analysis.