Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6b206525e7bb1c…

MALICIOUS

PDF

107.4 KB Created: 2021-05-20 20:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7e8425b985401be4984aa901c230140 SHA-1: 9a9ece7a803b1f1f611a6dd7e8674ea767b8d809 SHA-256: 3d6b206525e7bb1ca3922f708f30c3e14e2a75a75604434c341972daaa859ebe
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/strik?utm_term=modelo+atomico+de+bohr+del+cromo PDF link annotation
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/113295.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/kilunelovuvijut.pdfIn PDF document text
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/6379266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_603aa879f1865.pdfIn PDF document text
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/powuwewipaguba-bezalivusapuzun-xexesavofuti.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/vavodu-xolav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_5fccf16683ae7.pdfIn PDF document text
    • https://vifozafep.weebly.com/uploads/1/3/1/4/131407061/6102e.pdfIn PDF document text
    • https://fefezotexarij.weebly.com/uploads/1/3/4/2/134265886/a092f118bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_601d358c23ec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_603351d660a0e.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/likerajatob/bixutalug.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/nokia_9_pureview_with_android_one_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/21160008921.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/reporter_meaning_in_malay.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/what_kind_of_ink_does_hp_4500_use.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/computer_background_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/brazil_flag_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/best_brain_training_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/judging_scorecard_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00015112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15112 5148 bytes
SHA-256: 23ae8ed5b33a5aad766ff238175f8a056346325e823355c59d1ad6e5a3d25874
font_01_sfnt_off0001626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1626E 11676 bytes
SHA-256: b546be59f4527d8ae1c67ca9759fc3c6c325914b2f7a92e0ed7c9a7958cbb15f
font_02_sfnt_off0001887d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1887D 16132 bytes
SHA-256: 82f7aa4fef2cd90733ed84ef1d81c041b15990b82a49830089245cc24b586ea2

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