Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c48ab5782c31798…

MALICIOUS

PDF

95.2 KB Created: 2021-09-01 13:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 986b70ac9c585cd3d002c6986c966c9d SHA-1: 0b595caee78daa58714a34c7d1cddd58652e34f7 SHA-256: 7c48ab5782c31798873ecaa3cb8240d15cadf522cb8c18a87ba71ff9f8cdbc98
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/248075e17676ad19c4083f9c0d7e8674/robuzutolivekem.pdf In PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e230cb8d8---50651689985.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a720c07ce97---vafapojuju.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/kopuxutitizugexowap.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/17280749710.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f72ba8729---dorudonidigalosaxodota.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/gifedorijubed.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/xodojod.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/1646ed48272e7d0a80d3b3274559b2e0/defezokutivuxar.pdfIn PDF document text
    • https://buyafranchise.org/files/files/derapobogamutok.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/lobowemixudoxumadimebo.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/97523348403.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/45527288454.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3a768b1e98bf5b8c580dceadfcf3ac88/60180261409.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/47916094181.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/24248794597.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/35q890m1lbfvcprg9qt1kbdgi5/bobaresuzugozelasekiweg.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae781bc806---zidomagajaragaki.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/vuduzoredidoxalibole.pdfIn PDF document text
    • https://www.utn.ac.cr//sites/default/files/files/taxomepud.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0p5djgcnal3pj1lm7d1ecen3j6/sizevudijoxapetizikivadu.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8689f261ffd712c570cab8968a4a0e10/biredoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=good+morning+cute+babies+imagesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 17820 bytes
SHA-256: ec72aff50cce001965f0083c5fbe509060e0d26bba35e1a55a88346f63bafd1f
font_02_sfnt_off00015487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15487 10944 bytes
SHA-256: c6a9cd53f208e27d22a6f8822e443c29faa3a816d7b9feba4a74673fd0df8fc1

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