Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e91d5644999242…

MALICIOUS

PDF

158.4 KB Created: 2022-05-28 19:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 005048436fb69f351b4bf63b01c59fb0 SHA-1: 0ed4c0a12629a2a433db0b94b8d3d5de61071fce SHA-256: b0e91d5644999242a01fc11177b461bd308a7749cb4339cc67eb000561b3130a
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains embedded JavaScript and an external URI pointing to a suspicious domain, indicating an attempt to deliver a payload. The presence of a visual download button and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware delivery scheme. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=shell%20alvania%20ep%202%20product%20data%20sheet%20pdf%20free%20file%20free
    • https://zalozudipob.weebly.com/uploads/1/3/4/6/134673455/b81828e.pdf
    • http://legrand-etika.su/kcfinder/upload/files/8832233590.pdf
    • https://vuradawodi.weebly.com/uploads/1/4/1/4/141435591/709ea16bf101.pdf
    • https://shareen.persianfreegate.com/share/admin/upload/files/77014144906.pdf
    • http://epoxidice.ro/mm/file/11739858.pdf
    • https://xoliguzi.weebly.com/uploads/1/3/4/2/134265359/sibileze-gosaxaxorivejik.pdf
    • http://4bx.pl/public/file/tijiwa.pdf
    • https://cbmpolska.pl/www/js/kcfinder/upload/files/14225579141.pdf
    • http://casadiriposoronco.it/admin/data/files/files/70645694527.pdf
    • http://xn--om2b17qba631m.com/files/Upload/file/72676351611.pdf
    • http://parfumerieindex.nl/images/uploads/82997367108.pdf
    • https://topas-septiki.com/media-temp/img/uploads/files/92704440083.pdf
    • https://jeralizijofuki.weebly.com/uploads/1/3/4/7/134710598/demenuzurosalewewet.pdf
    • https://lefusavuforuv.weebly.com/uploads/1/3/4/4/134490278/ramakabif_porirujive_maluleza.pdf
    • https://fekemajena.weebly.com/uploads/1/4/1/6/141608405/6193509.pdf
    • http://artpolyclinic.com/file/files/nagefusalorubavowojipil.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002104c.bin
90373dfc3184c751ba7aa49698373e19f89e5c9cf591cc13fbdbf1e4585d7587		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2104C 22664 bytes
font_00_sfnt_off0001b486.bin
9c4fdb75c5d06b9f2c540ae79a990eb7db5cd2a806f086fe342e88477bd9fc87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B486 8556 bytes
font_01_sfnt_off0001d181.bin
3437617e38d7615ee64054c58aa3d68949dd1af7ec85f3f0d8d8831247116680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D181 26196 bytes
font_03_sfnt_off0002387f.bin
dc55c32848b670f4b604fd2f620f197174c90e599fddc85e9b3f3fba853aad3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2387F 11080 bytes
font_04_sfnt_off00025252.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25252 16792 bytes

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