Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b603745aabd1d1…

MALICIOUS

PDF

46.3 KB Created: 2020-09-30 19:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09642c9756c98b3291ae5ff05cde6ce SHA-1: 385bae97f317fb8153f2edd98ca117aadc133be1 SHA-256: e3b603745aabd1d17b45321701c1979036bfd065642d28fb62a0c35daa6fe1fd
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL, suggesting the primary purpose is redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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?keyword=hanuman+chalisa+lyrics+in+telugu+pdf
    • https://site-1036743.mozfiles.com/files/1036743/dalusiwirifudabuki.pdf
    • https://site-1036874.mozfiles.com/files/1036874/91254295485.pdf
    • https://site-1037253.mozfiles.com/files/1037253/gilevipodekuxozatuvore.pdf
    • https://site-1037075.mozfiles.com/files/1037075/23538531908.pdf
    • http://gapuf.josemleyva.com/uploads/1/3/1/4/131452922/finipizevis.pdf
    • http://files.mableyfarm.co.uk/uploads/1/3/2/6/132680986/nixutinolesegod.pdf
    • http://sojezurif.hetzlerart.com/uploads/1/3/1/3/131378985/1af927d21e.pdf
    • http://bumuto.enotecaathena.com/uploads/1/3/1/3/131381130/xefop.pdf
    • http://golaziw.gods-story.co/uploads/1/3/0/7/130776054/6873d1736da.pdf
    • http://files.suffolkjuniorchess.org/uploads/1/3/0/8/130874283/wamoxivutu.pdf
    • http://files.reallywildadventures.co.uk/uploads/1/3/2/3/132302859/jatenuguledo.pdf
    • https://site-1036696.mozfiles.com/files/1036696/zibadaxukajuzolefuvubud.pdf
    • https://site-1038556.mozfiles.com/files/1038556/77267895888.pdf
    • https://site-1037028.mozfiles.com/files/1037028/vikubibipeges.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062fd.bin
c7ad1c7776ff4b6f28240598808a3a5034db1c3f9b33c28d37c978dc97906c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 5632 bytes
font_01_sfnt_off00007600.bin
552002fcfc0ec80a849268e1320e20d3193070a3d390e1f7c81af7b5cd370e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 4624 bytes
font_02_sfnt_off000086c6.bin
19cbee2bb09e2a5dc224fa1772b16561732202c0fdd55bb3657f7140d0526ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C6 12204 bytes

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