Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e07e14f8e9cd06…

MALICIOUS

PDF

68.3 KB Created: 2021-09-25 22:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5a0793109d561c4dc7350335e13e59e SHA-1: 9e2d1e1e7b8b2e2c17539a8691501eefd719e564 SHA-256: 22e07e14f8e9cd064f5a7a7488e3cc6485398bdd4fd755ad7288737131b9276d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide a clickable malicious link. The presence of numerous external URIs, many on disposable hosting, further supports this. While no scripts were extracted, the overall structure and heuristic firings strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://220-wm01.netdbhosting.com/file/80771717989.pdf
    • https://ppsu.cz/files/file/zevefufuvepu.pdf
    • http://studiomarcheluzzo.it/userfiles/files/zobigi.pdf
    • https://arhometutor.com/userfiles/file/74743581022.pdf
    • http://propertiesforrent.com/userfiles/file///pejelinevofo.pdf
    • http://michardardillier.com/ckfinder/userfiles/files/90074179301.pdf
    • https://grandiosieventinuziali.it/filesUploads/file/90494356852.pdf
    • http://esoftland.com/userfiles/file/jaruxejizidadapejoxataden.pdf
    • https://groupunsur2.com/contents/files/19113731307.pdf
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/19970709363.pdf
    • http://hairfibers24.com/upload/file/84823891961.pdf
    • http://bestorkate.com/uploads/ckeditor/files/38434526824.pdf
    • http://stilna-ya.com/_userfiles/file/71973692591.pdf
    • http://letresorellebio.it/userfiles/files/dinanorapob.pdf
    • http://ceomit.com/fckupload/file/49000892250.pdf
    • https://krantiservice.com/ckfinder/userfiles/files/37401276902.pdf
    • http://dautuck.com/uploads/userfiles/file/28901144370.pdf
    • http://muntepa.com/userfiles/files/11621128335.pdf
    • http://jatechkj.pl/upload/fck/file/nosomewase.pdf
    • http://whipitleather.com/userfiles/file/kasesuwomex.pdf
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/xinodoruboxubafuni.pdf
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/kopusazerovorokadibat.pdf
    • http://dexgerm.com/data/file/userfiles/files/64722617555.pdf
    • http://musicpark-live.com/userfiles/file/najafamevejodogatoja.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161442bbb3fed9---vifomibivedeborowulogilov.pdf
    • http://jcpingie.be/public/files/69315527178.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gta+san+andreas+cheat+codes+pc+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_off0000b05b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 16792 bytes
font_01_sfnt_off0000c86d.bin
9b778ba67e5d61e384a60f4bda0b9c6ac39fd1859996c5bfdb8cc11d183b2413		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC86D 14004 bytes
font_02_sfnt_off0000eb7b.bin
9134d57b81cdfab707cf51360425316ebba6b1579ab16d0e8f6a1d7ba0922db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 10616 bytes

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