Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c7892dac090db…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 05:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4656155cb355cafcee9372eca2e06ca6 SHA-1: f4ecc3812141ca9340621200c5d2b96ef4efbf21 SHA-256: 986c7892dac090dbd62e18bd786907c20903b50d42152095bcdbeb6a333e404d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains numerous external links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a payload. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=nba+live+mobile+unlimited+coins
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/2u9td4hu48ikt0qvqkaqfkopc2/zujezuvawutiva.pdf
    • http://amon-syotengai.com/userfiles/file/79382057489.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac22e57060e---97319229552.pdf
    • https://anmoul.com/userfiles/file/10633236977.pdf
    • http://crmrealty360degree.in/userfiles/file/funagilobuxafirarasaxutug.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26846f797---lezemonetadanolaxes.pdf
    • http://softwarefactory.nl/images/file/tosodule.pdf
    • http://riggi.ru/userfiles/file/sigufawupovuwagudojulipoz.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/2s2e7ljbtm73lle30ppue7o9kt/linez.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f99cfdce9c78335e3a38a9db5e679c31/85310159993.pdf
    • https://ivanda-commerce.hr/userfiles/file/86429897309.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3e57e176f---zuvawiret.pdf
    • http://tutaylamhet.com/storage/ckfinder/files/ludifirad.pdf
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/27309598536.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079db20683a6---74433910282.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f753fd8af446942ad09c094b2aa7756b/babavuk.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/3k8ttkl5qsa8junvqtf9hb0nc0/fasogomamese.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/867998807529953c44632e2053a8fc40/xozadijide.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/u78u145h1adngff33nf8002s3g/18033238825.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975b48604e0---xipapif.pdf
    • http://kayamedbursa.com/userfiles/file/rerulejuvexerovew.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fcdb4d97---32410023436.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/26/kizixulunoguzefuxujutes.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2c7f912ac9d82ce4ea3f675085191c90/loretagem.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_off0000eb57.bin
3abb0297036b8efb7d2e67b48190ea8ccbd5dbbf68cb784f5f6a1988211d5132
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 10712 bytes
font_01_sfnt_off000103fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 16792 bytes
font_02_sfnt_off00011c0c.bin
1b6d66139f59aac2127df72a9f5079961301acc3ff4bfc2288f6211955f6acbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0C 17852 bytes