Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb002d893899824…

MALICIOUS

PDF

89.8 KB Created: 2021-06-25 19:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f44d8c042a20cce0d9de98e499fbf9df SHA-1: 396055a6b078f7f56ac1ad25615af4ba659ddcfe SHA-256: 6eb002d8938998245a9a23b1fb57a92f98b9b758eb84ed376a9ecf596340180d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a70d2b9be23---zirakeduvupubulawoxila.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160851be22703b---2344920715.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c04b7abd---tunikonemupuvewugofirir.pdf
    • http://asbu.net/uploads/FCK_files/file/69508589109.pdf
    • https://kisikana.hr/userfiles/file/47847159530.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/9414c269b29b287a4103b0b273e7fc69/2137979590.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a7d451d6d---somitixemijokukavow.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ad9c119e4---wokezunuxibuza.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608131634dec9---dasafazanegewuwevilaw.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f2a1202de11ff5e175757ac721fb1267/xufobobezarom.pdf
    • https://appvid.eus/userfiles/files/65546311597.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a2b9e1ae---85124233400.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/148b97473868d13f0ec54992875db63b/51827741527.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/sftkvolfh9bnl7os9vfiqscvg0/4926450906.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782c6f45f46---tuwumesetegagemibenujag.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3fba77a14b2eb503363b2e7d3fa878cf/58911617071.pdf
    • http://hanhthien.net/uploads/file/29152470413.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7ea9760b872e7c03f75374d68af9c8a9/27978138743.pdf
    • https://bushregenerators.biz/userfiles/files/92490466368.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/3853fe0bdb107065a1004cf9bd3a058d/97898594549.pdf
    • https://vestol.bg/files/file/49956298277.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6f8db9fc2d45b5f164799426c0990a1d/38366611565.pdf
    • https://isleo.com/i_photos/file/xazejotonemaz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=all+our+righteousness+is+as+filthy+rags+kjv
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1d.bin
866f155a84def515c28216270ff64577cb7e2c4f2295994a9271a21da7818d46
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 10976 bytes
font_01_sfnt_off0001158f.bin
e74aea734d3bdeec30057b8b38a1116d2da1a4c1f1cbe854e4fe9e0b1f85ce28
pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 16948 bytes
font_02_sfnt_off000141ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141AD 16792 bytes