Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff0642c98e50956…

MALICIOUS

PDF

75.5 KB Created: 2020-12-21 08:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60df2de79c9ac882992c0ad504f847f1 SHA-1: 7ba8a0a3836a69abf6f40a16976b976899ba9749 SHA-256: 2ff0642c98e50956ff8d429abd30fd8e641d6eaea078497e7918c1a3f750c4cf
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm with numerous external links, suggesting an attempt to direct users to potentially harmful sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/strik?utm_term=wallpapers+for+laptop+aesthetic
    • https://vapojulugib.weebly.com/uploads/1/3/4/6/134669528/1508370.pdf
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5fb4a30fe956a.pdf
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5f9c111a9767e.pdf
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fa54aced9696.pdf
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/depuwiti-zudizexidat.pdf
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/0b5c20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b4e72f8b574a0f546cd/1606224719672/71685092005.pdf
    • https://s3.amazonaws.com/sinadi/lemanepabejufedijatex.pdf
    • https://s3.amazonaws.com/davawina/billiard_games_free_for_android_mobile.pdf
    • https://uploads.strikinglycdn.com/files/1c5df7cd-b4ac-4cc3-8b0a-61918c75e115/skam_france_season_3_episode_1_english_subtitles_download.pdf
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fc119c8e18c5c478e22d4c0/1606490568833/lofuzifadozirexineta.pdf
    • https://s3.amazonaws.com/simujix/xewirigul.pdf
    • https://s3.amazonaws.com/waxegatulo/minions_banana_song_mp4_free.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/knighthoods_reading_answer.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b76c.bin
ee6f16e0c8fbbdb31aff1aaf3ce7e76a5fe775949f4c4bd5e090cddb5182f6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB76C 6676 bytes
font_01_sfnt_off0000c844.bin
5442ffa0bd2f3a98f396b63287f50335fe83ca929beda2e32f8985ea583a0dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 4796 bytes
font_02_sfnt_off0000d8ae.bin
6fd4fd44f16a535f371435749e7bd64f027588b8577bdf46250320a0c72882ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 10640 bytes
font_03_sfnt_off0000fd33.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 16164 bytes
font_04_sfnt_off0001122c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 4324 bytes

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