Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe48bc1ff9af9a9…

MALICIOUS

PDF

72.7 KB Created: 2020-11-12 20:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4e480dc3277ed167ba8dbdb3ae2b8e4 SHA-1: d98a9916297fa53b83fb176a49ca52e3d5466602 SHA-256: bfe48bc1ff9af9a9651b3d71934c5c99cdb489f1478d5026e3ad41d7895f6a6a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=carswell+air+force+base+lodging In PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/7298374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_5fa7d72021312.pdfIn PDF document text
    • https://dugizade.weebly.com/uploads/1/3/4/4/134442098/rezuzefabigibavevaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f8fd0a070842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fa46bf23e255.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1d46e8dc.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/db1ac5abb91b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f871387c017d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f97473955681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f91353db5f47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/potevip/pikadalekenononozunor.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/43049277575.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/11th_grade_junior_or_sophomore.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5152 bytes
SHA-256: f9fd6377117631eab536fa030525ff12225dac5c1eca264cc603f7773adbf088
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 11312 bytes
SHA-256: 9745643dae52dd79f0d51f60230202ac271b115d3be39579e40400e50306b05e
font_02_sfnt_off00010801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10801 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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