Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddac0bd8ce9a1e33…

MALICIOUS

PDF

72.3 KB Created: 2021-05-19 01:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 27455c063b2516352c23de37c454b140 SHA-1: 07fa18a5eba5b0826cd6448a3e142bad513d6c30 SHA-256: ddac0bd8ce9a1e33e290452451cc8173fe09f631e1985dc247b17a8cb9d17366
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it's a redirector link for phishing, specifically a 'free-download phishing' lure. The embedded URL, https://fokemale.ru/strik?utm_term=jogos+de+ppsspp+para+baixar+no+mega, is used to trick users into downloading content. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature.

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://fokemale.ru/strik?utm_term=jogos+de+ppsspp+para+baixar+no+mega PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5ff574ae4f516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383460/normal_5ff4b5c87a1bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410459/normal_5fc5810dbdefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5feeaaef73c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446038/normal_6030991221b77.pdfIn PDF document text
    • http://nokirixako.iblogger.org/tejojilux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_603cb97fcd624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_602822d4ca1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_603bfdc337166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirepirujigega.epizy.com/praise_and_worship_songs_lyrics_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5509455e-f626-4487-8880-19c2e87fc5b1/explain_risk_measurement_process.pdfIn PDF document text
    • http://pupiloxesafefiz.epizy.com/2013_toyota_camry_maintenance_required_light_flashes_8_times.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/rezosuzedulenotitefep.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/21045714559.pdfIn PDF document text
    • http://nasewuji.epizy.com/sanepovalovivupigom.pdfIn PDF document text
    • http://roparewuna.rf.gd/mitemifevax.pdfIn PDF document text
    • http://wowesuwufurofak.rf.gd/ganesh_atharvashirsha_sahaja_yoga.pdfIn PDF document text
    • http://kopamur.rf.gd/15896754505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccdd9b30-2ced-4503-a4d8-0fe60a4b9421/portrait_photography_definition.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_off0000d8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E7 5444 bytes
SHA-256: 0fded7bafad4c21071ab44c6043c6bd4bc15bdf7ee32f6715e51faba955451aa
font_01_sfnt_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 12756 bytes
SHA-256: f8d8539b676bd9a5da7d3f19824cf55916ce5594429902444a0bdd0e5d964fb6

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