Malicious PDF — malware analysis report

Static analysis result for SHA-256 0486c02bd9dc988d…

MALICIOUS

PDF

88.5 KB Created: 2021-08-17 01:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c379eda1f66572ce5a7fdf9e2c1aac7e SHA-1: 72320818bb77ee479dd3e41fd7eb4040d211c047 SHA-256: 0486c02bd9dc988d58a16bb6ed4bf8c8f95f2523bcf6b4587251c6f466aa95c6
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other disposable hosting sites. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://cissud.eu/uploads/ck_editor/files/95167920856.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63e3dd9f6---xusamepotigajinopuv.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090fbe535da4---votafuximola.pdf
    • http://co-wemart.com/careeruserfiles/file/20610167598.pdf
    • http://aaaexpressheating.com/userfiles/file/wegegubajitopazup.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f63e970f7802663bc2b9a184ba2b65af/54402697933.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/dccc5cad800b23da21d8b264d8f95afb/tetirudejus.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9a1980712---nekofozomalubefu.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/71353ab76a291a3121782cc5a461cb6e/66219889956.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4a45f01182b2bda18cebb28e5de2c6dd/losinuv.pdf
    • http://architects-desk.com/uploadsfile/buxatiterijatapodi.pdf
    • https://aljuboori.com/userfiles/files/74669091022.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607608ef56b85---11938526755.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16079629134d33---15717454031.pdf
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/66500399843.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/cebd4fde53b2cc13d15ab91e7be01663/55563521793.pdf
    • https://lmbri.com/WYSIWYGImage/file/gobepuliweniredof.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/832348eed3d08f99944fd1e23a486389/25719291786.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e09716fdb---68620788281.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/efbb8b51ad191850539037b8f74b6342/melekapenere.pdf
    • http://bbfrontedelmare.com/userfiles/files/zibawelimibip.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/78187a17ddd4497495b9113076320099/gaxodezuvefupirovewi.pdf
    • https://efnnma.org/files/file/kegagusefuvamoketola.pdf
    • http://notariocprietoa.com/notaria/documentos/files/54811875798.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ayat+kursi+dan+artinya+mp3+download
    • 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_off0000f63b.bin
ccccfdf85f16e2d5fcfe1f441afdc6bdebb798d2d19545058071699c91c53fef
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 10964 bytes
font_01_sfnt_off00010fba.bin
224b6a77fd32f93f7f1ade6fae5422eca9e10728293a5430555a992245eea0b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 16600 bytes
font_02_sfnt_off00013ab8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB8 16792 bytes