Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae6359e574dec87…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 04:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c28be5841205472218f72c34f02e4144 SHA-1: a557dab14392421334a8adfe54c0a93c8adb372a SHA-256: 2ae6359e574dec8745aa792a9e716ad78fea3dd8732f3cb8211c143652aa9db7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of multiple links on disposable hosting and compromised CMS upload storage suggests an effort to obscure the ultimate destination or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b34f6e5b9---77748499100.pdf In PDF document text
    • http://coming-c.com/userfiles/file/32767684590.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/d44d839333dba26b60cc0e393d14cc7f/bufix.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5feb73dc36---sawowowepena.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/vujewenasekabawex.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae96caa8b6b---tisiwopetejoveriz.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/negaxixikowodifoletimorim.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/48511915193.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/40487092482.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee26aaa8b---92238665438.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb41edd16---wadegasudorezisiwaxodeba.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/e48b78cff4f13d7ba79bf0bb8a6ee657/70588390842.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/8675003135.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f63dc3d10---48227167579.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084d592c9f7c---36398281056.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/fe38550257a1f9aa27776ee08f941a40/19236794304.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103155b92427---58148274675.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c9c1c42c---54811251273.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2c5cbc038---nuwakitu.pdfIn PDF document text
    • http://simonide.org/userfiles/file/12822218728.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///24661032833.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607482ed2ed64---tutudomirubukolefereta.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/gaviwokusaxapikalov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pengertian+pupuk+npk+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 10532 bytes
SHA-256: c66f3be5f11075a43b796a1568b9153d38474056d232b07961b5f479f7ecf731
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 17036 bytes
SHA-256: a0096b7260b504bcd24205470fe79caf057fc93ad1ee98c1eebd3669279a0481

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