Malicious PDF — malware analysis report

Static analysis result for SHA-256 86682f9e9bf3ae6d…

MALICIOUS

PDF

95.2 KB Created: 2021-06-28 00:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4cce305a22e778c37386949189169ad4 SHA-1: 900053738bcf7c3de5b16a985472216a0352782f SHA-256: 86682f9e9bf3ae6d0f15bb1aa28ac5be5ca3ccec9adc63172c99050cf15e6255
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. These links form a link farm, suggesting the document's purpose is to redirect users to other malicious files. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://moto-bike.pl/userfiles/file/zetojufoxizariw.pdf In PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/449d49bfa0e5e531455174f0b2e37934/17638069327.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b9bed6262---75252863233.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082473a3d6d3---52861041422.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/3583if8j3049u1f7o7hce4j5tf/zujid.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/xuboworuvefunow.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/lq3edii4juv3d3jbqq0tc3jggg/45786621161.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d254d11556dea1b932abe1329d023980/rizavazenodi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/6ee4b9o1fpnli5mj4smnh38oj3/tixoranerozuxapupufajoja.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d3dbcda2---64842165730.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c67d50c8c70e3771fdab88295f834a64/kekupogiremim.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e6a22dc1---49464009536.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160809aafef153---xuxozoboma.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/kozewawexezifiriwawe.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/sudeda.pdfIn PDF document text
    • http://614move.com/clients/4890/File/27512991572.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/63672906691.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67d68bef80---mikabela.pdfIn PDF document text
    • https://network-italia.com/file/sekidosojux.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa649c15a7---kilagubojewonakip.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/1569732182.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893039ebda4---zapavimatesoj.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/bf051e2b5731f14b158cac5ddd0b069d/kupebazurowavofosopewe.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/74b78af2e1d6ef5d3ae25690cfce67e2/29299598765.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607845deeb5d2---3082032143.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160801615099cb---74691703744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=once+upon+a+time+freestyle+lyricsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 10880 bytes
SHA-256: c20ffa6eca4b029998992dea4a7defe2dd282d6c300bd77d72bcd052ef56b8e2
font_02_sfnt_off00014022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 17344 bytes
SHA-256: 5c755a27fc67415959003426145f17800e446adc7255a5bb4f58224431a0ec3a

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