Malicious PDF — malware analysis report

Static analysis result for SHA-256 be36dd5efaed40c5…

MALICIOUS

PDF

86.5 KB Created: 2021-08-29 22:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb2aad9210b2ee8ccf780132eba4fff1 SHA-1: e68597eb3e789ba740999802e8eaa8828d2b2de6 SHA-256: be36dd5efaed40c5bbba960f91c9c8f58a23be491aaab87951efe5f7038aa1c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external websites, many of which are hosted on compromised or disposable domains. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pixomot.ru/uplcv?utm_term=computer+troubleshooting+and+maintenance+pdf
    • http://gwardiajuvenia.pl/zdjecia/fck/file/livogigimivovaweve.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/70545e7c3768d22d44f59f87de60ffe9/96874440280.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/823f85f04d76e0ca3a6a14239c622ac3/72226330440.pdf
    • https://uniqrelation.com/userfiles/file/juxiwijejatubuxava.pdf
    • http://elektromig.pl/userfiles/file/mosera.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/lusomeviwikodovepaxa.pdf
    • http://itkaufmann.com/images/fckimages/file/84880506020.pdf
    • http://bungefamily.com/clients/5233/File/15619301957.pdf
    • https://eliteplacementagency.com/uploads/files/91268444681.pdf
    • http://abwrosedale.com/uploads/files/25535251768.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/8jop3i46cnomnb6mbcarthub42/mipebepubez.pdf
    • http://goldnumber.info/userfiles/file/86156524735.pdf
    • https://foundryindia.org/userfiles/file/kaxilikevagupajoxojozax.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f6f3bc2f---puwodakewezo.pdf
    • http://giasuminhtam.com/Images_upload/files/78238899037.pdf
    • http://liffeyartefacts.com/fckimagefile/file/fazujakafuze.pdf
    • http://elm3rad.com/file/wegadobavowixifuxufezemo.pdf
    • http://dwornawodzie.pl/userfiles/file/kugudafubup.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5ba7c6736c7c55c2b2892075674fac53/14467228338.pdf
    • http://www.herbertvanderbrugghen.nl/draft/tedajobixitunojov.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/88867620533.pdf
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/40579359805.pdf
    • http://ubest.ru/images/file/93290179674.pdf
    • https://tradingphrases.net/userfiles/files/80194043015.pdf
    • https://kamarkosong.com/contents//files/jerazasidoxokeredu.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f220f4b4---18695221247.pdf
    • http://cementfeet.com/userfiles/file/vevifonixuxipixuvozexop.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_off0000ed96.bin
d604587df8d8c86a331388c800e9eca821a3986d5940eee9a96988e6cca826db
pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 11336 bytes
font_01_sfnt_off000107a1.bin
88fd52f325b147d6c4d0367be2c962db7b2be612bc29f2dd44d57b8ed26d92a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 16808 bytes
font_02_sfnt_off0001333e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 16792 bytes