Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1fdf34e28df203…

MALICIOUS

PDF

71.4 KB Created: 2020-12-17 20:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 653f814f296b754d717ac30a62787b4f SHA-1: 2f0bebe79d3746c7e64c9a0fb304699727d8af13 SHA-256: fb1fdf34e28df203c7136f419488ad957bb480bfc82616e19e5ad8a0c7846814
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=cuanto+mide+un+centimetro In PDF document text
    • https://giboramogu.weebly.com/uploads/1/3/4/6/134627050/4196070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/captain_phoebus_disney.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/architectural_drafting_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3921b1fc-eaf8-4836-b3ba-3f1fce54a2f0/bavipakufaz.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/12332530205.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc9b3239309303fb82ebe32/1607054115941/tijuzuguwosepired.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce21029c32423a38e610bc/t/5fd0988bb8bf0379e60e5614/1607506066230/unblock_debit_card_regions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4da13485235c86bccad6/1606372770997/private_society_cosmetics_mystery_box.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc575f4df132613bbdc52ca/t/5fc90802ae28fe4947420367/1607010306609/44147155579.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/lelum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7925ca4492a057e243d95/t/5fc8fa538ae58f63939120db/1607006806024/maps_among_us_minecraft.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc13e6cfa04221c714d3a0c/1606499949583/48808107835.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/54438537451.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC974 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 4780 bytes
SHA-256: d219371938ba0e880969181da9f37ef8ab920a6b685cb802593883fe0298a675
font_02_sfnt_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 11500 bytes
SHA-256: c90005b7c0b03e65fb8eaa68199c339f272aa4ceee7f5e2c892f4007ba39d7de

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