Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9aa7d3c26de2e2…

MALICIOUS

PDF

79.3 KB Created: 2021-07-13 17:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5708a53fb05d2e40da1e415aede974d9 SHA-1: 212b696994d7a57b01b0fa540145fc1dae953e06 SHA-256: eb9aa7d3c26de2e2a023b4abb65d6c806f1aba8e6489726a42cae3d24bbdd8c4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ClamAV detection and ML classifier also flagged this file as malicious. The embedded URL, https://queure.ru/square?utm_term=god%27s+character+and+attributes, is the primary indicator of compromise, likely leading to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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://queure.ru/square?utm_term=god%27s+character+and+attributes PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8bf5a3601b306b46f87e0/1625866074785/just_mercy_chapter_6_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8706a3249a6038709a8e4/1625845866251/alessia_cara_wild_things_mp3_song_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec79dc760c9e2bcf420fc5/1626110428834/how_to_get_free_battle_points_in_mobile_legends.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a1674d2175279d1041b2/1625792872019/stages_of_osteoarthritis.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c6b9dbb92d34f5adade7/1625802425657/rocky_mountain_spotted_horse.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD463 10732 bytes
SHA-256: daed877b9c643e446326cef36fa84cad0e4892b46533442fa55833410ae88b0a
font_01_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 16956 bytes
SHA-256: 1a8089fff89889b85000c612add2a0c3f4a318e5355314683972cf74e7adacc6

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