Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe9ad49d996a14b…

MALICIOUS

PDF

95.0 KB Created: 2022-06-03 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 4ef893d5aadf51c0cccc4e600d4feb50 SHA-1: c1661c64e27d1a1e38c582c3ac88433700552ace SHA-256: 8fe9ad49d996a14b33c7bb9eb5f8d67c5c0488207dc77e027639271e99279f3f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is indicative of a phishing attempt. The document body is heavily obfuscated and does not provide direct textual clues, but the presence of the external URI strongly suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yubit.co.za/YmrXLWy8?keyword=acrobat%20pro%20vs%20pdf%20expert%20vs%20adobe%20acrobat%20reader
    • https://xn--80aab4aif1bzi.xn--07-6kc3bf4angc2g.xn--p1ai/files/files/jifojogeta.pdf
    • http://555banket.ru/kcfinder/upload/files/fexewuvazi.pdf
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/sobojosumif.pdf
    • https://equator-maritime.com/userfiles/file/6845641921.pdf
    • https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/wotabizigu-sanazawibawom-medulazigubupo.pdf
    • http://glbrsciencefair.sfiab.com/data/userfiles/file/vipimapiketamepekunilaxen.pdf
    • https://www.kpglearningbox.com/assets/kcfinder/upload/files/naluxuzu.pdf
    • https://tumulole.weebly.com/uploads/1/3/6/0/136054957/617029fb.pdf
    • https://bolegabafewibe.weebly.com/uploads/1/3/4/6/134651697/donabifenom.pdf
    • https://libadazoxipa.weebly.com/uploads/1/4/1/4/141426008/6814115.pdf
    • http://phelieuviethung.vn/upload/files/55285110523.pdf
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/xinafudekajub.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161fe75956b225---vutido.pdf
    • http://studiogalata.it/userfiles/files/sagesesuxekulo.pdf
    • http://chanakol.com/ckfinder/userfiles/files/23173953782.pdf
    • https://pimowaxe.weebly.com/uploads/1/3/5/3/135397576/luxebed.pdf
    • https://mepopukivar.weebly.com/uploads/1/3/6/0/136083549/vumeboniku.pdf
    • https://aimic.com/userfiles/file/93714191005.pdf
    • https://unstitchedutilities.com/files/file/68705890563.pdf
    • https://gawirida.weebly.com/uploads/1/3/0/8/130874347/26e241b94b222.pdf
    • https://bewemulo.weebly.com/uploads/1/4/1/4/141415138/621fa.pdf
    • http://toitureetfacade.fr/data/Files/vujeleporowatomatebo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001087d.bin
73c861e8d71f53e381070b9de442f32861d52f52a9c3250b2954d73362138a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 20020 bytes
font_01_sfnt_off00013d9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9F 16792 bytes
font_02_sfnt_off000155b6.bin
aaffbaebe110386b92f0bc03edb2cb3732c301f7a1263ad068f50446a9113bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155B6 10660 bytes

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