Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9e3c308701ce75…

MALICIOUS

PDF

87.0 KB Created: 2021-07-06 13:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5b7d2db06f379aa2a224a6c49d2e5c8f SHA-1: 75d8908e9d756e45e655ec5e3c92190223644f84 SHA-256: cf9e3c308701ce7583c89ca034f4f8d17508538a12a3ee266756de2c61313752
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic firings indicate the presence of external URIs and a link farm pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=doctor+in+the+house+mahathir+pdf PDF link annotation
    • http://hourinkan.net/js/upload/files/fitufeladurejomanogar.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/fosekesupixixanujifamisa.pdfIn PDF document text
    • http://flexa.cz/docs/file/90605513329.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/56274543053.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/e4aqsglama4duuqr58a962ijt6/94311984599.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/94682066440.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/nuxulutep.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/p01h12g6o326supkjlig80rqu1/11768299980.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/tgpeqhf9ptvndmea37qg718nrd/nuduzagemu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/e45497309384c00f36087825171e1393/lemoxalitabiwi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/fe40f707301b8bc59e82960688d5135f/67004416679.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/95363283207.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ead6ee708f---13108618728.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/zirutexisasatab.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a30ea3999---toxobeselikivazufuvebe.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/9991296106.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/86214921252.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e5bc3e085241c185888578c72f0b8a5d/15652653287.pdfIn PDF document text
    • https://brs.jo/userfiles/files/3927112162.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cb0e2c155cc79f99cb75b5ecb03eb3b/26532297000.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/levoladafuga.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/82135743160.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/wofatakoro.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_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 18240 bytes
SHA-256: 018eba4739199804f83da113a277862e5c5c949c16b639f69012cc595b96c24b
font_01_sfnt_off00011bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EB 10940 bytes
SHA-256: 596d132acdb71c00f0a4149a3d43770c2a2cc8273d6a54d2eee9c7745ecfcf11

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