Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1aea6ac6d8dcc89…

MALICIOUS

PDF

90.4 KB Created: 2020-11-11 06:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aec4e98e648c938d5fed074bb216a9a6 SHA-1: 90eec5ea6d4f868542ddcce9eae9e536f8de9488 SHA-256: b1aea6ac6d8dcc897fb9fa188cafe0dd3deabe845978eaa33a69c2b3a30b24e1
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?keyword=adult+adoption+forms+for+georgia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8d6e70eb50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5f99de92212ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_5fab138ce13cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f942d5018837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f875e4c1ba25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f98c907994c3.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/tupunavowaxosixu.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/lejif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f8e6e8674de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f9f36c97209e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_5fa758deca1cf.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/nowonovege/beninozivutebubizatevoriz.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 5348 bytes
SHA-256: 996d806a7faf11d8d42173abacb1229d39a59a0ddcb057f02bbe5139f6a08156
font_01_sfnt_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 11808 bytes
SHA-256: 5a2b2a7ffce9f357a94fbe94f6d909f4ab2b49fa908f131593a7ed4b122ab82d
font_02_sfnt_off00014741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14741 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3

Open this report in the interactive analyzer, or submit your own file for analysis.