Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff82d7b0626f6e7…

MALICIOUS

PDF

69.2 KB Created: 2021-02-23 02:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 48d9d8cdaf5b49b56374aba1a405479f SHA-1: d3cee2e01c9480d8d338043416d3219fd19ab5ab SHA-256: 1ff82d7b0626f6e760a289dd312b6b97db3cf69d39cd7acaacfb226d1263688c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://yafferge.ru/wix?keyword=el+%25C3%25A9xtasis+de+gabriel+pdf+google+drive'. This URL is also flagged as an SEO UTM redirector, suggesting a phishing lure for free downloads. The ML classifier and ClamAV detection further support the malicious nature of this file. While no scripts were extracted, the presence of malicious links strongly indicates an attempt to redirect users to harmful content, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=el+%25C3%25A9xtasis+de+gabriel+pdf+google+drive In PDF document text
    • http://fesabip.iblogger.org/81310002594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_6017a3f53b79e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_60013a71f2ba9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fcfac5947f33.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/9194812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_6001d01b73318.pdfIn PDF document text
    • https://noxazevoda.weebly.com/uploads/1/3/5/3/135348256/656242cc1.pdfIn PDF document text
    • https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/931b17a41a.pdfIn PDF document text
    • http://jetavimazi.22web.org/net_framework_3._5_offline_for_xp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5fef3cb530319.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sunoxif.rf.gd/1143644294.pdfIn PDF document text
    • http://busilumun.rf.gd/72413894767.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/myanmar_praise_and_worship_songs_lyrics.pdfIn PDF document text
    • http://xezujuwevan.epizy.com/kofirogazejogujonosupe.pdfIn PDF document text
    • http://xefejada.epizy.com/python_for_beginners_freecodecamp.pdfIn PDF document text
    • http://kinuzana.rf.gd/simultaneous_equations_substitution_and_elimination_worksheet.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_off0000ce75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 5576 bytes
SHA-256: 572fd27f8c4074467703acf31eb8039f7d4da7e524e4aaf8cfa7e58b9e5915ef
font_01_sfnt_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 11148 bytes
SHA-256: cf857bd404e1d2401187bf2673cfb30c507de64b54746ba8e28331c019056b72

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