Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a97b209849d105e…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 19:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a089e86f3bd787ed7b4eef0a3760e8e SHA-1: 13bebdb11af8447b5afbbed20b2ee79e2dd5b6d4 SHA-256: 7a97b209849d105ec34eaaea1a107da40497e68cd2d4000fc897a121c4704164
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/be34834152baba4fe160041a5ce1e8a7/girawimomutometukati.pdf In PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/13502134880.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/resipesazegewopozox.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/087c068713c2fd467e2f3cf859672a4e/90601392456.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d2d63b2f6adc5019fd7507773f974d7f/44222785198.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/c4deab9fa6e3161fdd245d29714148ec/kuzulajepinagamojeke.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/41722317402.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/nivogep.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/8b40531ef9124741755f15b5b57539bd/tedig.pdfIn PDF document text
    • http://sequoia60.com/clients/875776/File/mazupivore.pdfIn PDF document text
    • http://jfe.hk/userfiles/vadamofo.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/pujizuvoxonifevadinoxuk.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/7478525941.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/61893265966.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e11eaf514---fabebupija.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/45521370468.pdfIn PDF document text
    • https://polandpools.com/contents/files/34918644195.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/i9a4qaetoacl63qn158b4ubmei/kegita.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114f1f0090f0---61597247085.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/xedobizerigomiku.pdfIn PDF document text
    • https://ikansambel.com/contents//files/78530251966.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/fatitilikazufip.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69cf18bfc---wemariribirazufoviteviki.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lb6v0ktq59idp962j3n93us31j/vibulenazekofigu.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/45694037050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=teks+sayyidul+istighfar+pdfPDF link annotation
    • 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_off0000bf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF11 18216 bytes
SHA-256: ae0a1fc6f5afd77c36ad4a7996f31b1a785ef87cec0769f31dbcc65e2ad5847a
font_01_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 10824 bytes
SHA-256: 0a22e6f3ce3b5b428f043b2401de85976c33b6ec56a5787fe081e7814947d00d
font_02_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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