Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8247050119a50d…

MALICIOUS

PDF

72.6 KB Created: 2021-02-20 17:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c014272cad40724d76b911bd109f50cb SHA-1: bbd578b8edfed8020db21a8d34785cdfaad49fce SHA-256: 8d8247050119a50da89dccffafe49c93d7c938a35065536910147e9fcd44125d
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL `https://leonvi.ru/strik?utm_term=que+es+composicion+artistica+ejemplos` is identified as a redirector for a free-download phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=que+es+composicion+artistica+ejemplos PDF link annotation
    • http://interbankdigital.com/word_nut_game_freemzxwr.pdfIn PDF document text
    • http://nokexukuzifuv.22web.org/kovojufugupuver.pdfIn PDF document text
    • http://all-gopro.com/63463052014ni3d0.pdfIn PDF document text
    • http://org-fruit.space/43892906530oqdjg.pdfIn PDF document text
    • http://slampochka.ru/12953265784xb02h.pdfIn PDF document text
    • http://7gusevshop.space/sazurajewaniz9jxo2.pdfIn PDF document text
    • http://save50.pro/906868159239p2kl.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/fotojipifuzitul/giditarelideruxagage.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/exterior_angle_of_polygon_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/gabidarobosimibukus.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/81343671482.pdfIn PDF document text
    • http://komadolosa.rf.gd/suvifikokibabuvatapijuv.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/nintendo_ds_emulator_apk.pdfIn PDF document text
    • http://duxurulokij.epizy.com/annie_besant_information_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/net_core_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/food_costing_spreadsheet_templates.pdfIn PDF document text
    • http://pubupamosala.epizy.com/plastic_deformation_ppt_slideshare.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 5216 bytes
SHA-256: 1c902f52fff5b593ce0f84d8208dfed8752637c16437e1dd77e8ffd4b0788a24
font_01_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 11492 bytes
SHA-256: abdca02089b03a395689261a98518e0f2b4425c1edd6db6d09cee6143342a7e2

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