Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed57a2ee46670e6…

MALICIOUS

PDF

77.9 KB Created: 2021-04-01 19:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b1e273ee2be5d43814716c3bcf34b774 SHA-1: c76bf7a8ecaf927482ddc93e093de57704e54287 SHA-256: eed57a2ee46670e6cca3dcf8dd1945b113d5a67f81e5af12e628160a00d68a76
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 lure related to 'ID compliance' and a high-risk heuristic firing for a redirector link. The embedded URL, 'https://vilenefex.ru/strik?utm_term=how+to+tell+if+your+id+is+real+id+compliant', is identified as a potential phishing or malicious redirect. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and heuristics point to a phishing attempt delivered as a document attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=how+to+tell+if+your+id+is+real+id+compliant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379837/normal_603e877454009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_602107ebf4147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5fea43f0d8f95.pdfIn PDF document text
    • http://xulonagubalipa.66ghz.com/congruence_of_triangles_class_7_worksheets_cbse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_60099cd5d63c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_6040a760c1bf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/eurovision_2019_armenia_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/biology_worksheets_in_spanish.pdfIn PDF document text
    • http://baxosadukosi.rf.gd/guxozojajotitozejumub.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/juwevojorefaru.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/dasogazudunagevamu.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/500mb_mkv_bollywood_movies_free.pdfIn PDF document text
    • http://vepibali.rf.gd/fejezewugubasuwovodeberod.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/dovumux.pdfIn PDF document text
    • http://bumevibil.epizy.com/clarinet_music_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/zorogewerurejeji.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/is_the_night_manager_series_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/neneped.pdfIn PDF document text
    • http://mixomexazuvoxod.rf.gd/movies_free_application.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/levenspiel_chemical_reaction_engineering_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5340 bytes
SHA-256: d50e770a241a9eb6a3885e9398668a36e9cb39551aa863fef9946da822c4944f
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 10832 bytes
SHA-256: b5a60a898bb8a254ba624884ee56002ed5f99f69edad4845955178aa0964424e
font_02_sfnt_off00011bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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