Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0e2e26bbff00b0…

MALICIOUS

PDF

95.2 KB Created: 2021-01-08 17:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936f79307c5013494ebcc1e574676455 SHA-1: dff04a52bc63c84e31e0da7e8ee2993210ff173e SHA-256: 2c0e2e26bbff00b095577418979100b636741ccb3fe337a7b9d3d9fe6ae54f0d
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The document contains numerous external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to SEO manipulation or directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=islamic+amharic+books+free++pdf
    • https://jigudisite.weebly.com/uploads/1/3/4/6/134603970/dbb07f848d1b.pdf
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/f13d533.pdf
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f905cd462950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5f461605-3443-4044-94fa-18a8e73872a6/ninefemupololidarojudi.pdf
    • https://s3.amazonaws.com/napisakaluja/counting_australian_money_worksheets_year_3.pdf
    • https://uploads.strikinglycdn.com/files/4dbdda1f-8afe-4588-b9ef-50645f5466f9/download_stickman_creative_killer.pdf
    • https://uploads.strikinglycdn.com/files/b70ead1a-0b02-4a16-90a8-47d5b04feef3/jutobidapofizom.pdf
    • https://uploads.strikinglycdn.com/files/a8e1a95a-99f2-4bb7-80f9-c9b627976f77/94589360710.pdf
    • https://s3.amazonaws.com/jozetej/zatenukimolitukarezig.pdf
    • https://uploads.strikinglycdn.com/files/9ddc191f-3808-4a27-97e9-22e8e7e609ef/open_session_in_view_spring_boot.pdf
    • https://uploads.strikinglycdn.com/files/893712e6-fd77-4f89-bf7c-1d21d0409c68/east_west_furniture_houston_tx.pdf
    • https://s3.amazonaws.com/dojivewobasuval/app_video_maker_android_terbaik.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • 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_off0000d6af.bin
0ac25d80ccb7d0944036f67994f84110b06de91be8f93044e2c8c1e292e7beb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 27200 bytes
font_01_sfnt_off00011eac.bin
6c0818d44bf3639b0b8e8a879d41a93b8b7e7186d331ec86ef303fbe94268f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 5536 bytes
font_02_sfnt_off0001314f.bin
5f7b0c00227f05670d31fab7a56477ed67ae88c01ef03cd0dc3dac2dfd8e419f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1314F 10720 bytes
font_03_sfnt_off000155ee.bin
f2bab230cf7e2a32add7c3419a04157d4bb92bd0a57eeca82e5312adf384dcf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155EE 17224 bytes

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