Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb17275aafb6f91…

MALICIOUS

PDF

154.1 KB Created: 2021-04-05 03:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9e4708e16d1f7c3563eea27a4dc38a92 SHA-1: bad497a1488b68f1436999529994559ea94d65e9 SHA-256: 8eb17275aafb6f9185e5b723fe532aa349d29fed28cd58fd41208db234532b49
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it uses an image lure for SEO redirecting to a URL related to 'economic development in nigeria pdf'. This suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitated the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://seumenha.ru/award?keyword=concept+of+economic+development+in+nigeria+pdf PDF link annotation
    • http://gojovujewinunuj.mygamesonline.org/40159102079.pdfIn PDF document text
    • https://rafinavogeseb.weebly.com/uploads/1/3/5/9/135987446/dejobakamoguge.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/weligukejupofituzek.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/9fa5fcfce2.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/fc29d9aab8242.pdfIn PDF document text
    • http://onesmall.space/bozinumogisameriluwu7ph.pdfIn PDF document text
    • https://watinamubil.weebly.com/uploads/1/3/0/8/130813586/sadapadudotibani.pdfIn PDF document text
    • http://hookup157.online/xisatapaparovozezx8n5t.pdfIn PDF document text
    • https://wufirojotuxo.weebly.com/uploads/1/3/1/3/131398242/5979650.pdfIn PDF document text
    • https://kudoxere.weebly.com/uploads/1/3/4/5/134591480/kanisiza.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/b45da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revudipepofaten.myartsonline.com/how_long_does_a_bone_callus_last.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/sogoratagam.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/bios_update_gigabyte_motherboard.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/travel_reports_m40.pdfIn PDF document text
    • http://kikanelomer.onlinewebshop.net/making_content_comprehensible_for_english_learners_the_siop_model_5th_ed.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/idsa_guidelines_fever_central_line.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/21434991218.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/winafapotixuz.pdfIn PDF document text
    • http://domuromu.atwebpages.com/what_causes_a_furnace_heat_exchanger_to_crack.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20443 5260 bytes
SHA-256: 350cf2b2b5bf67808773c9cbecd6a870f516807ea157bf6db94eacf62a4a5ed1
font_01_sfnt_off0002161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2161B 13620 bytes
SHA-256: 467194d3f89f71227d81c63a92dc5c2c641691badef98b31d005416d6bf18c14
font_02_sfnt_off00024447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24447 16168 bytes
SHA-256: 307fed2657912882860e86a2afaf81b036476c3efb537bcb5a2517b552d2be6f

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