Malicious PDF — malware analysis report

Static analysis result for SHA-256 040b2c55ce513423…

MALICIOUS

PDF

78.0 KB Created: 2021-03-08 09:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1da8c76053e0ea5e81f2ff84b7ef76f2 SHA-1: 94c77a2a59940968fb5541db08a121f0f9f37826 SHA-256: 040b2c55ce5134236cefe038594a7f1ddea927e892aeeaeaadb1f50336d1ad94
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://ponafet.ru/strik?utm_term=101+wine+bar+menu+portrush PDF link annotation
    • http://uscarins.info/xijanezudolipanazamuzajrkfp.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/verbos_irregulares_en_ingles_ejemplosaqwpv.pdfIn PDF document text
    • http://nuzarekuzugav.mypressonline.com/how_many_calories_in_a_medium_iced_latte_with_skim_milk_from_dunkin_donuts.pdfIn PDF document text
    • http://jidojagijubu.iblogger.org/41768372652.pdfIn PDF document text
    • http://fezanabuxa.22web.org/ps_vita_charger_substitute.pdfIn PDF document text
    • http://idclick.cash/ruzivaxamilovazikilnolx.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/68899215022.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/hotpoint_gas_oven_broiler_not_working.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/what_are_the_different_stages_of_reading.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/bosed.pdfIn PDF document text
    • http://xixesudu.22web.org/39360909188.pdfIn PDF document text
    • https://wesarifalonaba.weebly.com/uploads/1/3/5/9/135961423/bowazuna-luworojug.pdfIn PDF document text
    • http://nutesane.iblogger.org/serodogize.pdfIn PDF document text
    • http://closemaze.com/90831102835fymfi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivolipo.epizy.com/mutofowovunosovef.pdfIn PDF document text
    • http://buripire.rf.gd/neuropsychological_assessment_online_free.pdfIn PDF document text
    • http://sabenimuzu.rf.gd/bizumuxikanejipinivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6538e8-b691-4ed0-ab80-65320fab43b1/bectors_food_latest_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cba5a37-7de3-41b9-8c53-a3b8cb7e4de8/jonupilasevut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49dafb1b-edd9-4ec0-bf6f-ecb53ddf9e93/51845264769.pdfIn PDF document text
    • http://temekem.epizy.com/kezoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc65ec6b-68c4-4c3c-bcd4-b4d9a68b7059/cat_electric_forklift_for_sale.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_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 5356 bytes
SHA-256: 2691b675afa8eb43f0dbf1e7e3a5f7c021c220b89cfc68fcd627c491ba51b7f4
font_01_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 11920 bytes
SHA-256: 8383436566730ab8635886c7645d127d30962f524477689f3979ff5d568654ec

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