Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1b57d37fda0089…

MALICIOUS

PDF

197.0 KB Created: 2020-11-25 01:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6256054bd3cf5302ea1a15cf548ba636 SHA-1: 952ad06c84fbacad3013025d546c53dc93849604 SHA-256: bf1b57d37fda00899c1c2fb72fa78110f7a5290b2c1b3433504722cf76d46788
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a download for 'apk oyunlar minecraft'. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=apk+oyunlar+minecraft
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdf
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/26d0b.pdf
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/rizunadavinox.pdf
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/dudejanubuxij.pdf
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5fa923834bf2b.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9b93f4e5b43.pdf
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5f9a4ae033e11.pdf
    • https://cdn-cms.f-static.net/uploads/4415769/normal_5f99c14e0e79b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1ffc5cfb-bcb4-4819-86d1-78329511856c/tutorial_navigation_android.pdf
    • https://s3.amazonaws.com/gezetega/the_secret_to_attracting_money.pdf
    • https://uploads.strikinglycdn.com/files/d88d1818-20b6-4b15-85fb-4a6aaf26ad10/xafovol.pdf
    • https://s3.amazonaws.com/dazinibonofobi/tobakidapivukamuk.pdf
    • https://uploads.strikinglycdn.com/files/2c95e46b-e386-470b-95ec-930c40dfcc2a/69357800801.pdf
    • https://uploads.strikinglycdn.com/files/318a4978-bbbc-4392-8895-d2db457cd61d/wekufalelixowax.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a1ef.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1EF 6440 bytes
font_01_sfnt_off0002b1b2.bin
ede077bcf9d936b2deabd1ca36e5cf164b77d75f1467ec74ab7a8d43bb048d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1B2 2856 bytes
font_02_sfnt_off0002bbdd.bin
5fb3bd47a86ed37a4ece924dc30e64c4c49352baf6d0fac5d6baf3426bf38d3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBDD 5136 bytes
font_03_sfnt_off0002cd57.bin
84c99cee7b629abe265a5fa7518bc1c7f7e3a3dff4a80146395775d3284252dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD57 19916 bytes

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