Malicious PDF — malware analysis report

Static analysis result for SHA-256 45337a2c5d585bd2…

MALICIOUS

PDF

61.0 KB Created: 2020-11-06 07:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916b85140a464032b4ecebe34c853deb SHA-1: d17a9a588479174c575751c9f160ec0e54416459 SHA-256: 45337a2c5d585bd23ec925fbd5370cce5ebebfe84c2f857ba8da35b7ddbceb86
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links to external PDF files, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links is to 'https://trafficel.ru/123?keyword=4th+kalma+full'. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text but includes the primary URL, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=4th+kalma+full
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8c4d619981b.pdf
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/1adccc23d6f9.pdf
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/c9863cd.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8bab0184f17.pdf
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f963e22d6a5a.pdf
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/sagabine.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/gigiser-gumifalejapigaf-mufeduj.pdf
    • https://faxufoxexukixel.weebly.com/uploads/1/3/4/4/134455740/3727894.pdf
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/7766306.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/pojetowur_xapavosoluv_pewomale.pdf
    • https://cdn-cms.f-static.net/uploads/4454162/normal_5f9fd89ce5846.pdf
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f9f120229a0a.pdf
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8c19389bc61.pdf
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5f9f94c279026.pdf
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/lagatapodegixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/clock_time_free_worksheets.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ee.bin
97a8eb3772f63c9b27a21afb34d0971483ef9c52a291ab3d2a31e839bf436836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EE 4288 bytes
font_01_sfnt_off00008877.bin
ad5f506d5f0df2048abc60b9e74b48575f28cde0674a938869fbaddbdfccd460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8877 12228 bytes
font_02_sfnt_off0000af66.bin
f1329ca57257ad983fecc932cf4ca1674b9403540866e2af1e0154f4696f60b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF66 23712 bytes
font_03_sfnt_off0000d82e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 4324 bytes

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