Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8461528de278e64…

MALICIOUS

PDF

90.3 KB Created: 2021-02-22 12:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a6d372809c37400191fc4b204b7e7901 SHA-1: 98634b5fc3fd58e13e76d05d1955be034e953fe1 SHA-256: c8461528de278e6459c7fb87c5fa966564cf7fe3019d3cc58c023b2c69ed47c6
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 0.9995

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://druttle.ru/wix?keyword=ver+1917+online PDF link annotation
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/muwopugu.pdfIn PDF document text
    • http://naturfresh.fun/gojumamopeloxuy3q7.pdfIn PDF document text
    • http://badgesverified.com/wozomoacadk.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/luzonapopaze.pdfIn PDF document text
    • http://autobuff.xyz/api_documentation_template_markdowng2q59.pdfIn PDF document text
    • http://copyrightshelpscenters.com/bible_timeline_chart_printablepw6y0.pdfIn PDF document text
    • http://reassurez-moi-fr.info/319537611l7ody.pdfIn PDF document text
    • http://vizit.store/business_communication_process_and_product_6th_brief_canadian_edition89f7q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fdd3c70448a1.pdfIn PDF document text
    • https://beperupofifu.weebly.com/uploads/1/3/1/6/131636755/junixanuvimu.pdfIn PDF document text
    • http://zespodsvetkoy.site/lexowagufapidepiwipr0k4.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/1802407.pdfIn PDF document text
    • https://vewominejijisos.weebly.com/uploads/1/3/6/0/136053907/9c94ae.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/fuwakulegeduv.pdfIn PDF document text
    • https://rutebesutev.weebly.com/uploads/1/3/4/1/134131531/wesefaba.pdfIn PDF document text
    • http://boomua.site/greek_gods_and_goddessest4twj.pdfIn PDF document text
    • http://play.allocine.xyz/movie/530915-ver-1917-pelicula-completa-gratis-repelis-mp4In 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
    • http://rejoxudirux.epizy.com/55395908116.pdfIn PDF document text
    • http://parowedotide.rf.gd/the_black_awakening_by_russ_dizdar.pdfIn PDF document text
    • http://kimogule.epizy.com/irs_form_1040_capital_loss_carryover_worksheet.pdfIn PDF document text
    • http://fopuzotetowux.rf.gd/forme_di_campanilismo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 4252 bytes
SHA-256: f5b6eb1e0f2ee42499fe87635baf53648040cb779619cb9a16860d3b65621656
font_01_sfnt_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 15608 bytes
SHA-256: a91209dd5facace79721cae8fa1cb834033d1bfa2fb46f037e361351ab33e22c
font_02_sfnt_off000136ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00014bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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