Malicious PDF — malware analysis report

Static analysis result for SHA-256 d619ee9a0f713912…

MALICIOUS

PDF

75.6 KB Created: 2020-11-27 19:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1837c4db719397f2876b459a9850eefe SHA-1: bb2c4951c3459a5375ba027d6b87f3d660da0885 SHA-256: d619ee9a0f7139121d07907c1a34565eed1c2a74343291cce23f8969caa51ca3
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 0.9928

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://traffnew.ru/123?utm_term=50+shades+freed+pdf+online PDF link annotation
    • https://kuxilididid.weebly.com/uploads/1/3/4/3/134387830/wejuru.pdfIn PDF document text
    • https://jowakalol.weebly.com/uploads/1/3/4/4/134480841/8935093.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/pujedi.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/jedofoxezinoxim.pdfIn PDF document text
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/2880488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/890ea719-9c4b-41a8-8333-dd4e91213701/zumikitagaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2553514e-255b-4910-8037-645846334bd6/holliston_firearms_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa65ba5-8f62-41b6-8f0c-fc9bff0aca3e/54752236678.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/lancer_rpg_character_sheet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C6 5008 bytes
SHA-256: 4d3b858fe68b7d51f021f2503bff1dfe790c1130fca269c3eb792ad48f75b65d
font_01_sfnt_off0000d1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B0 11120 bytes
SHA-256: 1ee71d0349ef6dc9ec37bfd7c233893d46dab4ca0ab0dea7a74b34b3228116ea
font_02_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 17892 bytes
SHA-256: d3b1e0eac0d212479976664e1d9910f484164424cc2c8040f6073c1ae2bcebf8
font_03_sfnt_off0001121e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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