Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe6dc80aa19a8fd…

MALICIOUS

PDF

86.5 KB Created: 2020-12-18 21:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0582105ce2bf775a6838db84d2c5d6d SHA-1: 49ecc1907e3c44f6332e0bdc2d9477a1a363225b SHA-256: cbe6dc80aa19a8fd44c1781b44061cbd2f5ecf9e81c6fbf9cc556ebf5703c85d
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics indicating it functions as a redirector and a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=star+wars+imperial+ship+classes
    • https://teduminerat.weebly.com/uploads/1/3/4/6/134665194/ea47af6f20828c.pdf
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/negud.pdf
    • https://zifizegesug.weebly.com/uploads/1/3/4/7/134719454/zubeguromek.pdf
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/genibulilan.pdf
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/8214408.pdf
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/3932594.pdf
    • https://zadoloxo.weebly.com/uploads/1/3/4/6/134602956/5e1f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lewuli/cursive_writing_worksheets_alphabet.pdf
    • https://s3.amazonaws.com/zozuxukoxo/attila_total_war_charlemagne_guide.pdf
    • https://static1.squarespace.com/static/5fdc9d0d74326d1ed153c25b/t/5fdca319ee8ee932d442dc94/1608295194044/29569718583.pdf
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc0ff6f7acac6192ae4581d/1606483823804/wulezofoded.pdf
    • https://s3.amazonaws.com/dinigugaxej/cartesian_plane_worksheets_year_6.pdf
    • https://static1.squarespace.com/static/5fc4c8ea0b6b03258f4e486d/t/5fd72844154d72787105851f/1607936069621/44679682663.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe26083c02f22b9dd6c5d9/1606297097558/zajabarinuxilaboluxa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c64b.bin
9698af42099ffd2120348aa7ea8c998ad92d0ad0f8dea1ae9e5cb296ee4447a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 13144 bytes
font_01_sfnt_off0000f024.bin
99c1e0caa2178618f581ca827731d2b4a141b9a59d24c550c53eb418abbb20fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 5368 bytes
font_02_sfnt_off0001023f.bin
3b25f2c11907ab9be90a4a3fc14cd90fc0027c78b62d909dcc4717b00b4622f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 2980 bytes
font_03_sfnt_off00010e8c.bin
0c4cddef7a22317da5adfd5e2cb72899f998295d4a72a0554ec8a5f194f28707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 11528 bytes
font_04_sfnt_off00013599.bin
270fcb0d3ff641748eb000e3ced1be535898909426ff122ee266b5d8917c3659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13599 16584 bytes

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