Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39f916b494d6297…

MALICIOUS

PDF

66.1 KB Created: 2021-02-19 23:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f7ae0fe1eeceeec979da523046bf03dc SHA-1: 5e8493ec6fa0145cef257d47b45542b1c289cddb SHA-256: d39f916b494d6297600ccf30ce3b53ae59ae85a5895ec03501d999770fac53c0
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://jottigo.ru/wix?keyword=u+groove+guide+pulley PDF link annotation
    • https://cdn.sqhk.co/gokarunedod/pqif3he/sevinisavokulimuv.pdfIn PDF document text
    • https://dufofisejufosu.weebly.com/uploads/1/3/4/8/134875198/343f7.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/fubalunosuwuzibe.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/f30343.pdfIn PDF document text
    • https://zetolame.weebly.com/uploads/1/3/0/7/130775520/sozudo_nesomozi_mivuvefedure_porubalenixusa.pdfIn PDF document text
    • http://javatow.22web.org/basic_geometry_vocabulary_worksheet.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/5350f2067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruguwozud.epizy.com/3747029395.pdfIn PDF document text
    • http://gizadopozi.epizy.com/74199208194.pdfIn PDF document text
    • http://zegisaxan.rf.gd/vobazupufusadawazudefunow.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/gawewebabexixunikagifap.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/chiquitita_abba_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/fowijagabepuvimixazipofox.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/inherited_hemolytic_anemia.pdfIn PDF document text
    • http://fodusazal.rf.gd/estampie_royal_violin_sheet_music.pdfIn PDF document text
    • http://mosiwifu.epizy.com/blaque_bring_it_all_to_me.pdfIn PDF document text
    • http://suwiwozeko.rf.gd/4862116683.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/beboxovunuzomazumevofiro.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/pikitetubusezebunusibes.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_off0000c674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 4892 bytes
SHA-256: 3cf41f4e40951463bca6c16bebfd7f7066faaa99a6d906735a00cfbdf3352c7b
font_01_sfnt_off0000d738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD738 11280 bytes
SHA-256: c22c07c40977aead11e095949c45a86afd51fea97fec60ede84220e4acd566b1

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