Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95fe1fc24fb3887…

MALICIOUS

PDF

78.6 KB Created: 2021-09-20 15:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0abf45efdb7ef9d83addb7c69ffd099f SHA-1: fece6c27dd762ccdddf81535923bb339f939dd43 SHA-256: c95fe1fc24fb388730298979d331c5410cde1051ff0a442b1b8e6f26854fb48e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, including one hosted on a compromised WordPress site. The presence of 'utm_term' parameters suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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=moony+movie+apk+download PDF link annotation
    • http://architettoletiziamasciotta.eu/userfiles/files/87096121262.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/76927175492.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/78626171621.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/84511709819.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/74052587646.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/42538560651.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/miditegodi.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vulokosixipegozururav.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/wujimasibotusubetof.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/b2ffa9440c33d439f10d02207991e1f8/85513507345.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/xufukulig.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/tejepije.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/47436931711.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/85352547957.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ib6uhcrg0iigjorbdp1c7b9071/nedupibabeke.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/49471461239.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/vudujepawumofuw.pdfIn PDF document text
    • https://anesaportugal.org/upload/file/zamuvutadokuzija.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/jakuxo.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/zivarujarirabatobawowob.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/nupizazomuvofodexerefexov.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/83426174254.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/lanoninobonoxomuxaw.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/vuronaziti.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137670ade09a---21640689406.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_off0000d169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 16880 bytes
SHA-256: 847166b333644f7054c920fd91a80e25313fc23cf475511c25576fd0a6150253
font_02_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 10540 bytes
SHA-256: df814242f913a1d7fa2c27bd8286b0dcc4ecff5e3a7b8932c47586f1d0372011

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