Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9e5cc7bd1d262c…

MALICIOUS

PDF

134.0 KB Created: 2021-07-06 00:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d382585f36183a751396dea0db5a25cf SHA-1: f23ecf7024cf7b1d8f1fcd425f806f44a26762bc SHA-256: 1e9e5cc7bd1d262c91f9f38b7687a5c6386a81b567f854262383b37eef9acaf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains. These links likely lead to phishing pages or serve as a distribution point for further malware. No scripts were extracted, but the presence of multiple external links and the overall structure strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9750

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://nomylo.ru/uplcv?utm_term=hypodontia+lateral+incisors PDF link annotation
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/bb9dfe01778dd23a4f0d5fa9c0ecc287/vutazabujuwelupikuwevo.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/0018b0d9cea6a97636f7731421ec4b45/291229649.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/werufusenozibugamon.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/51751820848.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5461a5b5f76f52ff890e6dcf02cf80ea/80854243079.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/9118687995.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/44569061462.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/jk3k2on693ghk1und8v6uluocv/79448006873.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/44ab4cc830fff31fe0fb71a69a59f001/82365337902.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd5cc8f2e3---tudigupevaxo.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/dd65ae7f35df8cb2935ffcd25b68d140/14638234815.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/54415168516.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce19f531ec3---78480270339.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f03bddf59---gumugoderi.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/51793227613.pdfIn PDF document text
    • https://altbuket.ru/files/23477357499.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/julufubotavirukoxesa.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/40935427630.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/a386686768e710d2d09aadcf4131b709/59596545520.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/zikewas.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c21d312f---dijikixozinenunonanifili.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/kijax.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/38855a721d707ea21b641eb18e563691/47173177173.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/doxebeze.pdfIn PDF document text
    • https://ancoraeducacion.com/images/88369489932.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb58e559493---kawiza.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/watefokilogevizak.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

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_off0001a914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A914 19148 bytes
SHA-256: a14a774f3b911d8e9b568f640f70bc2b570f87eeb773af2f680835eaf5779aa6
font_01_sfnt_off0001d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D995 10612 bytes
SHA-256: fcee88cb31554da515f8fd7b10b190bb6f563f905d906cd914ce72767c6234a7
font_02_sfnt_off0001f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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