Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9166af92ac6010c…

MALICIOUS

PDF

83.4 KB Created: 2021-07-06 22:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 95aa2abd471b1ed13c1f883987fc3a1a SHA-1: 7174de125a77c5ab18ebeae3697c2cae463e4b41 SHA-256: a9166af92ac6010cbb4809005b7a368d291fc52c8435b08c5b6a787d994191ce
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to websites that appear to use compromised CMS upload functionalities. The ML classifier and ClamAV also identified it as malicious, likely due to its deceptive content and the nature of the linked sites. The document's primary function is to redirect users to these external, potentially malicious, locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaa7c901a9---18663988247.pdf In PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a52f4383d61---puremiwetitutigumik.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074c291328b4---13849366634.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///7416042146.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609426b9676ef---41369969935.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/15809932740.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/luvonabejozigalagud.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/kn80feeh80gfh7rul8lvkkhbim/94684080209.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/2ebaa544c020c58210dbb96ea21ef385/94087368129.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/fapigutirulakizup.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/79d05e1459d6818c617f7404207c5c0e/xexoxikavif.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ba9c9577f---13970477369.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/54d847a070d1fded039ee0efc8582d55/pavizuzijal.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/fa33d66d446190e0704c0eae6572c56e/doluvunolitelimodafipi.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c626f3c1a---tukesot.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/92465411057.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/89496734070.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d7e283fcf---97018672705.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608343d06f13c---xitox.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc9991360a---3985275748.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd27075ddb---29097073709.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b19b9695---sonazinew.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/mmme197o2ojv2lmgidbt0539ss/78151128164.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/eb4e0e660bbbd9aa467b1ee190980a43/pewomavulonub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=recreation+plantation+homes+for+salePDF 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_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 17464 bytes
SHA-256: 795efb80cf35eb68d5761a65a5f43dfcb72347d86fe2212f7530a4af102eb8af
font_01_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 10788 bytes
SHA-256: 420a0539ace7c0a0f7fcc3b3172489ff04f486cd85e23a1b9d7654594f98c685
font_02_sfnt_off00012679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.