Malicious PDF — malware analysis report

Static analysis result for SHA-256 68353eaeeeb4ce36…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 16:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5e2fe1ff4b635052630a9177c6f924c2 SHA-1: 874beaeccbc8e59ab662e7c5212f0242d9bde5e3 SHA-256: 68353eaeeeb4ce36a3afac44c7cdb1768628539394c50268c17cd3ea56532934
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agnieszkapawlik.com/userfiles/file/93129167690.pdf In PDF document text
    • http://freeware-software-download.de/uploads/editor/file/932017471.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/kcm8cmbubf4gka6n6tosehnair/nofajokamazamanikujusela.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecd3603c15---99982230687.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/20390003113.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/8943273802.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/92491974620.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/55702512202.pdfIn PDF document text
    • https://bor-diing.com/upload/files/82854206747.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/4b0066a4015abd12887ae1ca9a2b1d39/9914636061.pdfIn PDF document text
    • https://medpressa.ru/files/file/gataxaletoxu.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630517542.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/59070386310.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/56972602956.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/56660555533.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130041d936d1---vuxevasumeseludefox.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/nugikokofofetutiwakazove.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/97891924931.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132c1b19e88b---nosemuzo.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090311542473499.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/jeziripiberiterip.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/36296466144.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/13643917443.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/24647295463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=drag+racing+best+car+for+level+4PDF 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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 10796 bytes
SHA-256: 3caf6b10a06ca2ec801f83a4bbdb59b7ce027766b9c5a7a549313401e303913f
font_01_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 17896 bytes
SHA-256: cfa34be166e84b0189486ccb7476444e31afaa50bb3c4e81ddd2c0872a1a9c49
font_02_sfnt_off000121e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1