Malicious PDF — malware analysis report

Static analysis result for SHA-256 11401011401466ad…

MALICIOUS

PDF

79.1 KB Created: 2021-06-09 19:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b335717afc714fb82da80fb729833197 SHA-1: 8bb7968cdef671ae1c473e74c0bb27db46b7dc41 SHA-256: 11401011401466ad37246d30d4c840bbd2ff5f50ee57c3645a2d3a570ad6491a
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, using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://midufefew.ru/123?utm_term=cinema+paradiso+violin+sheet+music+free, is the primary indicator of compromise, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/123?utm_term=cinema+paradiso+violin+sheet+music+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5ff3e43eb15ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ff24ec4415e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464297/normal_5fdfdf39a7d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_6012654140a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416672/normal_5fffaf5fdabc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_601101761453c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486367/normal_6052846127101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2d3f24-f2c1-4963-a851-3694c1bab132/xekodotokakak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8707f0-814a-47d9-8ee4-0c570a63622e/seiko_solar_chronograph_v172_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2431fb6-27ea-4dec-889b-09030e28aaac/how_much_does_a_trans_rebuild_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688e2765-e0dd-4813-b9ba-94b3c804deef/gedaguleninuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6e542d-647c-4425-94d2-c1498b2ea392/how_to_start_a_rhetorical_analysis_essay_introduction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59128ce-e8df-4d36-8784-e65630368d9e/vikings_season_2_episode_6_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc48757-e20f-4c00-af4e-62b6ed999572/what_is_a1c_range_for_diabetes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8346cb-fadc-420e-90f7-4ee86753857a/68787947472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0d193f-2551-42cf-abeb-24d9fbe70ef1/how_to_start_trading_stocks_for_beginners_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b6da5d-6b37-4227-b7be-c6d883ed6348/75336702327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d44af8c-6b5f-4ef1-8a74-536cc424cc81/jedofazodozesigox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ffae9d-edb9-4d2d-a639-d042d4c225dd/irregular_spanish_verbs_present_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedd93e0-4850-4bd2-bf9b-7da5901d05ab/36406460723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee80a389-bdf3-45ca-838e-377c393e8f0d/new_headway_beginner_teachers_book_4th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d153a256-4072-4f14-bb57-76458d04044b/gafif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711176c8-b080-443d-bff9-7088814a0697/sepagurudubifakijukoxev.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_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 5360 bytes
SHA-256: 2d25e2d992cd8ee4aa4e531f8964e3498943dcc9076e0d69fea5e83c6001b22c
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 11848 bytes
SHA-256: 21125188b9b06e69a0a22caae9d2329a57ac4dd215777fbfab29e927bd77cd77