Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cae2cffbe108376…

MALICIOUS

PDF

87.0 KB Created: 2021-03-18 17:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eb77e153c5b88fb6b59b0fe698e03ffe SHA-1: c7de722eeac74200aede15cb0892e3c91b4e1ff8 SHA-256: 5cae2cffbe1083764b3a15da9de1b856f68144fb708e3cc1fbbde20964a38dd4
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 heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The embedded URL 'https://jumiwimov.ru/wix?keyword=link2sd+plus+new+apkpure' is identified as a redirector for free-download phishing. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further confirming its malicious nature as a phishing attempt.

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://jumiwimov.ru/wix?keyword=link2sd+plus+new+apkpure PDF link annotation
    • https://cdn.sqhk.co/kogujipubap/igU0FiG/strawberry_shortcake_sweet_shop.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/18472828213.pdfIn PDF document text
    • http://fomizedo.iblogger.org/satadevunepibik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410000/normal_5fe3c37ca1ba5.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Gfiaiie/gabriel_rios_police_sounds_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460076/normal_5fe23d91dd721.pdfIn PDF document text
    • http://zipogagu.iblogger.org/70371717823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384836/normal_5fe44f5b3d072.pdfIn PDF document text
    • http://wegansit.space/silidovilojururavamromik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5ffc112fa0a3f.pdfIn PDF document text
    • http://qqkaxes.xyz/do_car_seats_have_expiry_dates_ukgdhjp.pdfIn PDF document text
    • http://retys.space/the_green_mile_book_review_new_york_timesz6bq1.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/zowejunef/nebraska_lawn_weed_identification.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/darksiders_3_trophy_guide_powerpyx.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/durga_saptashati_path_vidhi_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/53638477017.pdfIn PDF document text
    • http://tuvugagud.epizy.com/sanimokomabadu.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/psychiatric_mental_health_nursing_book_videbeck.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/kafulevimik.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/cedex_hires_analyzer_manual.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_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 5180 bytes
SHA-256: 96608cf7e2dc07ad09dc630691cce2a649be8f7292af2ca67cb7310fb1a494ec
font_01_sfnt_off00012739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12739 11644 bytes
SHA-256: 31fab422a66647e2f2d454123291720c7bfff7d2db7b0e807a23376451ebe670

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