Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af468bab8ea9b2d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-12 04:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 21312cb6a817a3077fba1903c7df3a1c SHA-1: 4a52fad9b07062082534d6b91eb5e16733f70dc0 SHA-256: 7af468bab8ea9b2d99b702945832b520784ea6736b5aa0477af09a89f070b99a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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.
  • 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://pistant.ru/uplcv?utm_term=ets2+apk+mod PDF link annotation
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/2b844079f35944a251c10443a9bd9a6e/25570424273.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/69236668822.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613764234c865---fuvaroxijux.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/wuzebexareximurazutajotow.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/sabizikutix.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/vekepotavolubi.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/18503308535.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/90137102090.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/92311391207.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/58930767087.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/98282590742.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/f54bd515223cf2a58dc583a52e3eb958/15793340071.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5014036c2---nerekuteresoxusedi.pdfIn PDF document text
    • https://flomogroup.com/upload/files/nomugelamabexem.pdfIn PDF document text
    • http://robedecreateur.com/img/files/91935724211.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/tokurekokizuj.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/jujip.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/84973562210.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/lefuw.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/kiwodavozepegub.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/nufananafi.pdfIn PDF document text
    • http://indemo.pl/Image/files/menopuzefinasimoji.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_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 10276 bytes
SHA-256: d972aaca79f423c336b60cbb04aec73bda0085effd6c40f6f75b9376c49ca775
font_01_sfnt_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 17928 bytes
SHA-256: a1b96167d015a337d3a25121e43fea1bfc4a0829d929926b2dd3aefb888ba454
font_02_sfnt_off00013055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1