Malicious PDF — malware analysis report

Static analysis result for SHA-256 7606d1e5d66143d7…

MALICIOUS

PDF

84.0 KB Created: 2021-09-15 10:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed1bf1d71701832ceeff7bb550004435 SHA-1: e4485e28c3b9b51ded8bf39440bcf27bb418b4bc SHA-256: 7606d1e5d66143d7726fa9e35e238d99cf31438960dc4db80bac85b2b412a1ae
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external links, many pointing to disposable hosting or compromised sites, suggesting a link farm designed to redirect users. The presence of a 'download button' heuristic further supports a lure-based attack pattern, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • 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://huntic.ru/uplcv?utm_term=point+blank+di+android PDF link annotation
    • http://hzkontejnery.cz/ckfinder/userfiles/files/kawonetowolekeralojo.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/77297603434.pdfIn PDF document text
    • https://limsurempat.com/contents/files/xivefoferajawel.pdfIn PDF document text
    • http://airzo.net/userData/board/file/94032660084.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/99963215745.pdfIn PDF document text
    • https://eurotig.ro/file/14987294571.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/napeborifolowafoteweva.pdfIn PDF document text
    • http://tianfonmm.com/d/files/nefizoroxisezatag.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/42036182538.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/doriwowenopulozuzituroju.pdfIn PDF document text
    • https://edarky.net/data/file/71874454647.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rugoxipitogigebavenad.pdfIn PDF document text
    • http://hoachattn.com/image/files/94906537945.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/78540684430.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/41284293929.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/57465324165.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/vip8a5kgrg8d0c834shmrk19uh/70403125303.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/24326042410.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a69ade6af92137ab0b6af3c19ae79c5f/4389403220.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136722b4c238---99740679797.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/91070251682.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/1de95545f5effae2d366551a495e72c3/gufejepasokatuwe.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/84361151301.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613f543d816c0.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/5f681ceafdfe533e991b54629b2b3353/rufufositajusebojij.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_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 18236 bytes
SHA-256: 39681dc2fa31b8baafa50008b580b8d9396f45f5785f7dc997316c57c768af6f
font_02_sfnt_off00012b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5C 10172 bytes
SHA-256: b204cf4874be054a99e90def58dc58c90045cb402362d2172b23c80994daa9a9