Malicious PDF — malware analysis report

Static analysis result for SHA-256 601b2e231084cad7…

MALICIOUS

PDF

83.1 KB Created: 2021-09-11 03:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aaee7e00a5e04a89339c580e8ef2e64f SHA-1: 03b4e59f4d9928cb03eab12341c4ba0e0a3c9bfa SHA-256: 601b2e231084cad7af304860afe19534ed95618cd4a4472521a7f82570133348
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. The document body is heavily obfuscated, but the presence of numerous embedded URLs, many pointing to unknown or potentially malicious domains, strongly suggests a phishing or malware distribution attempt. The primary attack vector appears to be directing users to external, potentially harmful, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ildongwire.com/userfiles/file/wokogup.pdf In PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/manuxu.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/63780439313.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/7306922080.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/natab.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/24835673347.pdfIn PDF document text
    • https://schmitz.cz/res/file/jupavedalowavodaraxula.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/nemexawuvaj.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/92222168920.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133108b50979---25338079847.pdfIn PDF document text
    • http://canadianrockies.info/files/file/1323762.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/42316523646.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/75487914677.pdfIn PDF document text
    • https://flomogroup.com/upload/files/renetufaremolaf.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/getamafogovagijilino.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/43459269743.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/91187252817.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/10188624313.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/munovuzagapivabej.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/21335900774.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/39067300817.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/guborafuro.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/novesa.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/nexukexofed.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134100e760af---sibifiziki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=change+video+resolution+androidPDF 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_off0000e01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 17684 bytes
SHA-256: 44d9b4347bae0462f04c75edd07685fbeb9581d3ad74b1442b61d7bcd95ced12
font_01_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12606 10724 bytes
SHA-256: 7f6e3c0535eb6e38ec9e67f39d2accc167dd5592863ad28689d7e3683d79e14e

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