Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7518d5e54f69ead…

MALICIOUS

PDF

93.5 KB Created: 2021-07-15 12:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1227e9caa6570759cf9220815058c7c7 SHA-1: 4c5f4a6d75eb88d0f5da368cfbf649714adccf0f SHA-256: d7518d5e54f69ead523a6e39f6093e6965be941813f91991a2c9bb9857d8f6c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple domains, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/a332b0ab2c616f18dc04a0b6519ed48b/635510870.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba1c1f551---koduvuz.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083a7f0960cf---89686753648.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/v6m15u9irme2c1kieqhcrlkpao/befur.pdfIn PDF document text
    • http://azizolace.cz/images/file/kademifipevax.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab66a9c0ce---79738931909.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/levarurixekebafu.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/asjvocj9o53snsa8k82klg84qp/4189628958.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/efdaf43ba022a395f098751a48e60da2/wifesasadofogidod.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/29960670870.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/livufojudesobide.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/dopuvemesiliridudezazu.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb48a2db16---30236005987.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/turuvoleki.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/20448254364.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105250707.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f71a13c8---35193432975.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160843ecd8c709---48908313188.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/99111611343.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wirira.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/45604897324.pdfIn PDF document text
    • https://kuepancong.com/contents//files/35025001170.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/62888b4015e90468195368e33616f049/tegekezidigojo.pdfIn PDF document text
    • http://sdds.be/userfiles/file/35955637297.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/gukidifojipozurerudumozin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=naruto+shippuden+dubbed+online+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 17464 bytes
SHA-256: 0e8bbee86a366f516b0fec13fc48476fb8a2fccd5e11a9f21c3d9cda08497ec3
font_01_sfnt_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 7872 bytes
SHA-256: 19ba88eb343cde724a4a7d89ce9b67235109f86f0e28a9d21754572f3f9cdbd9
font_03_sfnt_off00014d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D94 10812 bytes
SHA-256: 99b23fef8c560118586303148ede9f534d9a5b40efb9c3a1bb0f11f363d57fc0