Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a3ed26477658ba…

MALICIOUS

PDF

82.2 KB Created: 2021-09-22 23:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0d825354cf002a5414fcc3759061de8e SHA-1: a1e4803ae4c2e55683d8a7c571bbdc752bdb463a SHA-256: 86a3ed26477658ba738b73d27c6063b207bfee328665457cd3fa4917fdc4628a
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features a link farm pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. The presence of embedded JavaScript suggests it may be used to exploit PDF vulnerabilities or facilitate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://aylabawadi.ae/userfiles/file/61220306088.pdf In PDF document text
    • http://sarljarry.fr/userfiles/file/xaronanu.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/vatutafidujazopegajewof.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/1249862942.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/tawip.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090110480248.pdfIn PDF document text
    • http://esistore.be/userfiles/file/zasan.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/83757941845.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/41411928154.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/98170940920.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/41563406904.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/34ce81ffbdb8cb2dd2330263b1e854b6/96165121745.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/62168504505.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/ratamupimeladebijaga.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7pdafruoes01dgk7q01g6fmafb/sazotedu.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/31644135658.pdfIn PDF document text
    • http://pronobile.com/catalog/file/31988698668.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3f2a680d926e2ec3744697261b77f950/tapifafilawal.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/97458189696.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210905091432.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/24181143903.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146eb670df0d---koson.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d35e9ab2e3---pejojefujowemojagifaja.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/60690049818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=us+federal+govPDF 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_off0000de6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 17800 bytes
SHA-256: 2e2b13de8263acfd123010f34fdd1474f39cfa899dd8341d121974c278ef586d
font_02_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 10308 bytes
SHA-256: bb9ce59f6f3a10430af27da988e0b705926edfd0a01ddf2684760bdc82cee0a0

Open this report in the interactive analyzer, or submit your own file for analysis.