Malicious PDF — malware analysis report

Static analysis result for SHA-256 e107a7d3b3fa2209…

MALICIOUS

PDF

70.9 KB Created: 2020-12-20 04:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 90199867ead0d90017be4218209106e4 SHA-1: 261e2910b069a5980d19c2465a47f6cbb1d71561 SHA-256: e107a7d3b3fa22094806a18e5176a86a922b10cf5662479aebdab83425018066
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is weaponized to host numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=john+b+stetson+boots In PDF document text
    • https://nefavegipu.weebly.com/uploads/1/3/4/3/134365482/256c370357b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_5fa76fe966aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fb03f46cf5ab.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/wotapawidinojepog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413583/normal_5fc73414136d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f89c93540223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f99e7ce7aae4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc676cd1452f90b7f0b4806/t/5fce3d5cc00f007cea1481be/1607351647999/siren_head_printable_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/lafizunenajufelo.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/kamakura_tourist_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3c5b7bc966055df3f1/t/5fde040e7514fb3b7638e6df/1608385551302/afshan_zebi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/2013_bmw_x3_xdrive28i_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/idioms_worksheet_for_grade_7_with_answers.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
    • 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 4564 bytes
SHA-256: 30f60359eed468740aa0e11cf79cb61393b248d19ddf504a3f202203bbdad272
font_02_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 10860 bytes
SHA-256: ec8d86055cd3a7e3e8297bf200c48902df9bffa92ac7c1740db2dd552562c026

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