Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc12b2fa4a65ab1…

MALICIOUS

PDF

72.5 KB Created: 2021-08-30 17:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc1aca83af82267f29a6748a64d18049 SHA-1: 7e10d732f1d7537440671188ca8c7c13641157c0 SHA-256: 2bc12b2fa4a65ab11b0bd0b51e166cd10061cc31c4fded3be3758d566edade40
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content, possibly for phishing or malware distribution. The presence of 'utm_term' in one of the URLs further supports the idea of a lure, in this case, a fake song download.

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://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c68262804---25125072555.pdf In PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/a62bbfe69886a346a53c9d15338c509e/83679846661.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/021ce49f49f648ae6b72f930282bb603/gutekagimimagumu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161031596ae052---ruxikokopigufetavudaruw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1be57dfb7a---36529821094.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1b1854c8263398efebf950fc3da5c980/25096838288.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb2c76e2fb---41876221859.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160852f8181185---75308684392.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/82019860482.pdfIn PDF document text
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/zomipiwawivobabekojabozu.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/jazitisusisos.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/vedaso.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/a2f01583013a5c2dd215e75bef8b7777/genokejuwerekadirukawetot.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/51770126251.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ea904c420c8a13dbd7f0878d2c5f8404/modevoborogoviziti.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/5de8c1457b418766fa74d75e3c46fd25/91061333400.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/45247335696.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dae7e89abd1---towakafujede.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/51721527633.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ff7b642b261b21386a7b11f7490c41e8/pivogunazarelenoviv.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/magetegilodedatibufot.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050202550489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sultan+song+download+mp3+pagalworldPDF 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_off0000baca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACA 10944 bytes
SHA-256: 8d78c4a3e2c3985cffce168e31dfa249f588eb03a4eb8aa647c3e03ad6e31a25
font_01_sfnt_off0000d3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 15556 bytes
SHA-256: 1885418b53cdb4c176e417b700f4098920ac674ceb6c3170ead2987ab8030a1f

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