Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb46b543f9ddf2d…

MALICIOUS

PDF

92.9 KB Created: 2021-01-09 04:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d90d68695049bc1ab957e39db94beaec SHA-1: f272d7a9048860c2281d30e9df3f422930b60d49 SHA-256: 0fb46b543f9ddf2d2274cc8984a49ae29ddce50c9e9a35db4f1c02d7666a6dde
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/aws?utm_term=binary+fission+in+bacteria+pdf In PDF document text
    • https://xakajebegufawev.weebly.com/uploads/1/3/4/7/134729098/bitarunep.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/KihhdGS/petusiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_5fa9cac8da396.pdfIn PDF document text
    • https://rukatopuwor.weebly.com/uploads/1/3/1/1/131164291/kenakebixewov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd638c03cd30.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/ijqSBig/cheap_flights_to_hawaii_from_atlanta_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/5YicDAV/xawuvakekoruzuzadugagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://linux.thai.net/plone/TLWG/thaifonts_scalable/In PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/topixezoninuxen.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/zonipideluzalikulilat.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/fupagagoj.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/90154583442.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/72954835352.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/ramutizovofalamujego.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 5408 bytes
SHA-256: 830f0babb94fa1bd2f28ce0002a012e6d5499a20435b1788df1a2c8e54c93a7b
font_01_sfnt_off00011d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 12628 bytes
SHA-256: 1c09b5c89c26c7b43d7d5ffcb64eac9a5c59efe735790195ec51d0a366615db1
font_02_sfnt_off0001455f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455F 6700 bytes
SHA-256: ef95b0ec5382260b5a0851f23e0e10b783aaf9cff01d8574d69d23f2ee32d4c9
font_03_sfnt_off00015628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15628 7064 bytes
SHA-256: d5b06f76f19ebe30987066d5f4cd569607735ddf1af21a09e3c7ee2281d0af06

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