Malicious PDF — malware analysis report

Static analysis result for SHA-256 349592b184668c33…

MALICIOUS

PDF

97.9 KB Created: 2021-06-24 04:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c2cd047cd1b85df1d4c077301a30b2e SHA-1: 799274f32e195bea4df078def572ad3b3cdc5a49 SHA-256: 349592b184668c337d0e235552ea0d1148da32898d380a3530868bb9c7add61f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://longarmquiltacademy.net/fckeditor/userfiles/file/galofodufa.pdf In PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e73543309---vagesedileninu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d206597496b---71723838261.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac386ce678---sepotifetudijo.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/vabirelo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920bcc879fa---69586103100.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/q3iofoprkm00f2r8ses7hng9l2/14249848739.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/vumodinukiwixiwararinaxil.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab919c4671d---30894402682.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cb4d0a972---96529621714.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210602031655.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/fd1f253a7b314509d95f686e966f1aed/bozogugojet.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/57f1koglpk3jgmd0e1sehkf7na/58102316034.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/65093121374.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/sasoxupet.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/relaxowuduxuluw.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/0aa1f790e81a9a411f4cdac259b1a8aa/siweje.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b8eede628a6cddab909eeb70e42593eb/zukus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=space+wolves+9th+edition+tacticsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 5264 bytes
SHA-256: 683208e2cb5e3cd6f9ba5313545735afc69fd8033c7c01c2caf9071ffdf94bc8
font_01_sfnt_off00013d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D99 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00014627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14627 11344 bytes
SHA-256: a3cd870323d839b3c7b64e5622cc7610bf9d08802965f43f6d16ec60654a1f9a
font_03_sfnt_off00016b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B91 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e