Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1f41e2282ec7bf…

MALICIOUS

PDF

74.2 KB Created: 2021-09-11 23:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6754aefa92ec219e1cfd45642058da75 SHA-1: a32ae49865788fc91f1401484b3740ad4ae10704 SHA-256: ab1f41e2282ec7bf26b0785bf00f1f2cd71bff5bcdfa77916c4b93ddf773e20e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these sites to host or link to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.humillacionyestrella.org/ckfinder/userfiles/files/55235734209.pdf In PDF document text
    • https://mgs-on-track.com/uploads/misc/files/lusiroxidedikiveroz.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/tidad.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/12872811803.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/29912294723.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/gubixelimeges.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/98458002281.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/dunoko.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/5895637130.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/padoxirekavanuxi.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/14491332248.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/gunigowur.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/88873799445.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/34433136718.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/ziruzajag.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/59504132021.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/1aec6837216e1c4de6a4d443e91e6edc/vakajeribasezag.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/72904530395.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf9332016---94550906835.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/balimigupusonul.pdfIn PDF document text
    • http://halanmilk.com/upload/files/88392930592.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/69583168586.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/32435292127.pdfIn PDF document text
    • http://retailcop.ca/files/69416425441.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vo4i8agsdvobb1i8v9nf4uqmp8/wikaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=carx+drift+racing+offlinePDF 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_off0000bf2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2E 17120 bytes
SHA-256: 4e3da335c165a66b3d862ae30aedd750bc10b0950bee177e2924cd8d402f2308
font_01_sfnt_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 10616 bytes
SHA-256: b2e5f69b7346945f9494d00a39d2413aba64fe31335b981ab10c748e112d5729

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