Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4a5e4430cef18d…

MALICIOUS

PDF

72.4 KB Created: 2021-03-12 19:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ff14cd2b6fd4460865a29ba4d147dd2c SHA-1: 57bef07b7004f6317e062fad51cbae7049bb6207 SHA-256: 9a4a5e4430cef18dadb30465e7adbc91d06f2a9e894fbfdab9645ff2e95df6ad
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://vilenefex.ru/123?utm_term=characteristics+of+neolithic+revolution+pdf PDF link annotation
    • http://gogotaf.iblogger.org/28506787674.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/hjhbSje/3847210640.pdfIn PDF document text
    • http://easterthjg.com/27862958236uy7fk.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/e7ywWHQ/zombie_mob_sniper_3d_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/cQyfWng/72073504565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fe942f2cd120.pdfIn PDF document text
    • http://tacfitproducts.com/cfm56_7b_engine_manualohrgf.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/ehbZyNq/72650295577.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/MijSQie/ways_to_improve_website_traffic.pdfIn PDF document text
    • http://doporem.22web.org/6209055594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421472/normal_5fedf8eb2d456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6049b1adcb561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujiritam.epizy.com/face_shop_sheet_mask_for_oily_skin.pdfIn PDF document text
    • http://gibovutapobubu.rf.gd/dunadezupunufip.pdfIn PDF document text
    • http://toxuxefegetej.rf.gd/consumer_reports_best_sedan_2015.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_1d710f3b22604a41be3188d28a70403e.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_df414825d31447e187a8d3eadf21bb63.pdf?index=trueIn PDF document text
    • http://zunuwovadete.epizy.com/43682750331.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_0573f487c87b47e1a94bae2d838c86ff.pdf?index=trueIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_af19a7a646184598a823a08ec0eb0725.pdf?index=trueIn PDF document text
    • http://siduxosezuk.rf.gd/sql_server._database_xml_deadlock_report.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_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 5208 bytes
SHA-256: c7b219eb5274f33edb4a5a0bcaaac7f670e581e70b4f65ea597bfab07c56b938
font_01_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 10316 bytes
SHA-256: 5c1c146f2396f53e2b6a53a28e750b76c44d4bdc815bc8d685c145e7ab7d3ce0

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