Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da2b54ed7ce8075…

MALICIOUS

PDF

79.3 KB Created: 2021-08-25 10:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ccaf33178e90c64fb0b5f592954f775 SHA-1: 59bc1230132772d12ef842c9ea44a760bcca4576 SHA-256: 1da2b54ed7ce8075f199e8611941a681b8f7ee3f4603759b2047cf20ed79cf14
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/72569025249.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ihe7h2809d9s91frcqpijpnds7/22210971588.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcdd05eeb6---tujel.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/kulowaxizipojufalufasew.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/46393174707.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ad785a9018c2b9420b5f943f60635929/rijozuxoruzijavi.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/64017842682.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/mowadokejine.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/69aef800aa648575972fa15f5338decb/wetokodel.pdfIn PDF document text
    • https://alohasafaris.com/files/40244140387.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073d578057dd---situwekotaxuwepudukofatud.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/vaxelulologosufamaxorija.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/nifuvag.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c310aa8be31---fojusenalebuj.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b4e9e8e35b---ratinurivim.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/13440836136.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b628cc373d7---somonowizakonawubunijis.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/49839521825.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/52201488612.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/bo6bkfucuke23qkr7hjshk0o2g/zetiture.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/kepajivovoxefuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=shadow+boxing+with+dumbbellsPDF 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_off0000d643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD643 11096 bytes
SHA-256: 7f0b6ae5a9a6f2248d85df420d9309a82a1eedb9a767f306021270dfd848d9bd
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 15792 bytes
SHA-256: 384a5936f4486df367ae582990bc263699f2e2625be162c18eb8e318d555cc10
font_02_sfnt_off0001182d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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