Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4f13f33e79b517…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 18:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0c2c58405df233896f34ddcce5a9f108 SHA-1: b4b7d3abcc51d4e7b5324c49b9fe43407a1e2eb3 SHA-256: 1c4f13f33e79b51709d29b87ff047303e085145f1742f24e96108687cae75344
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://tourpon.kr/FileData/ckfinder/files/20210623_B79769281B0E4E69.pdf In PDF document text
    • http://fkhd.cz/data/img/60225387335.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b33fddf5469248616604ab7f57228334/14026546004.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/fcc0295624cd11972732c00b3e5a6800/84395117046.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f94a63222887e632683d979b2b34e1f0/83902777369.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/melafikedexi.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/l5q1s35mcvgdbdt6ejpjop4nnl/73028478007.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/a61f9aeff594c31813dff570d47c5acd/mosuvopijotubasidelonexad.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bb3e566c2---52261691446.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-30/20210530165241351219.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d26de0d19d3c9debbcd3e16133582448/51656231472.pdfIn PDF document text
    • https://isleo.com/i_photos/file/xubepawod.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/cf7544e3ec324d899202653467fa9d00/pamapopefonubutodedenegos.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/7187718582.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/bofutolobugolejonadetux.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/zifamafulivos.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b737c9f1473---22030558402.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0b108b78d---98195127451.pdfIn PDF document text
    • http://novichiha.ru/pic/file/zepolugejetigexugulesiko.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/81894965336.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/45180610142.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d3796b64a2e8b4a06388c8786d5eac8b/fovizalorepojevagig.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/jukewobe.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/kasozenorebewegebomofuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=characteristics+that+start+with+pPDF 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_off0000fa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 10316 bytes
SHA-256: eb01a3e2065c3acc820f55d7275d763870ddeade8719886a2b0a825755b53504
font_01_sfnt_off0001121d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 17212 bytes
SHA-256: 54cca1c70ebcd12eb911466018ffef848dbf5762ed47acaccc230d856467950a
font_02_sfnt_off00013eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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