Malicious PDF — malware analysis report

Static analysis result for SHA-256 1075be5cf41ed476…

MALICIOUS

PDF

84.6 KB Created: 2021-03-09 17:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 661e634387b31fcfcb333a0f70436bd1 SHA-1: 276b51cca982c9f0e2e45edc88d1bd1ba444e652 SHA-256: 1075be5cf41ed4766fd004f8f6c1c63eafecba4411b4100c59e1512fa4cbbb9a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-confidence heuristic indicating it is a phishing lure, specifically using a game keyword to entice clicks. The embedded URL `https://ponafet.ru/wix?keyword=summoners+war+faimon+hell` is flagged as a redirector, suggesting it leads to a malicious site. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=summoners+war+faimon+hell PDF link annotation
    • http://idealslimitaly-ufficiale.site/desde_el_jardin_warnken_2020db7jq.pdfIn PDF document text
    • http://sovetnik53.ru/manual_fire_protection_engineeringjowby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_601316a47bf16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fffbffe6a416.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/80510454078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_601f735b2612b.pdfIn PDF document text
    • http://yesstore.pro/marlin_336_tactical_furnituredil0g.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/48901784977.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382639/normal_6006237f49715.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/lerezazo/dibegapijavisezemow.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/kezamuwusenuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/nerefupofasabota.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/26393345185.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/rewuseluvopariwijojurotu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/magadopopava.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/scientific_notation_coloring_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/abandono_escolar_causas_e_consequencias.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/all_odia_song_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/67871077997.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_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 5204 bytes
SHA-256: 75a2bb8ac306c937284b123f2859f2a1880dacfb217f5335dcaa976a7e6f50d5
font_01_sfnt_off00011d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 12228 bytes
SHA-256: 863d88252db49d5ae2bfca92bd7efc77c56946b2ba0e1be2bb5c20cb0be77325

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