Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5e1eb4d08dd7e7…

MALICIOUS

PDF

80.0 KB Created: 2021-02-11 18:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 29cacff039309d150404629763352bea SHA-1: a2529f97bf40308d9d95fd4018884d4a1fe1ad06 SHA-256: aa5e1eb4d08dd7e7d6042ec0efc75bb8ff2bcade3c51a2c0a6b04c608d8de101
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wb?keyword=pacer%20test%20audio PDF link annotation
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/visogejerimudoza.pdfIn PDF document text
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/dekun.pdfIn PDF document text
    • https://zakuximonu.weebly.com/uploads/1/3/5/3/135346146/loworoji-texef-vegajowizag-butope.pdfIn PDF document text
    • http://xazonem.22web.org/choose_chicago_annual_report.pdfIn PDF document text
    • https://jozegolufipiz.weebly.com/uploads/1/3/0/7/130776065/fawuzuvopew.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/172f448d95a065.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/vobofe.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/ijboijl/9131594874.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/gfcfFcQ/equalizer_pro_apk_android.pdfIn PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/jowisi.pdfIn PDF document text
    • http://zakazuvanadoze.66ghz.com/52286689054.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/eiahFjf/livongo_health_stock_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/concussion_management_program_examination_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/20225490173.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/zowevil.pdfIn PDF document text
    • http://kudovumajumiw.rf.gd/blood_transfusion_guidelines_in_newborn.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/fowefubuvudov.pdfIn PDF document text
    • http://nufejubonuviwo.epizy.com/mawefiko.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_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 4900 bytes
SHA-256: 605c30470cbc7b5492a60864b34ff62f681507edb9edcf4a464a2ffed62ccc42
font_01_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 14248 bytes
SHA-256: da5c8872b8d9b93f79b9c3d5c78a819c841c281c23b2fe10e7a1de6050cdd062