Malicious PDF — malware analysis report

Static analysis result for SHA-256 890d679d615fd96f…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 03:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5f857d5e8b750037b3c5f84f923f28 SHA-1: 27a1f909b682d16b71dd34c8f5880a8b44419028 SHA-256: 890d679d615fd96f349d3b643cd7091befb85bda8f9fae2c6f6061d6b092493a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many of which are dynamically generated, suggesting a link farm or SEO abuse tactic to distribute malicious content. The embedded URL 'https://vilenefex.ru/aws?utm_term=tokyo+ghoul+manga+barnes+and+noble' is likely part of this distribution network.

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://vilenefex.ru/aws?utm_term=tokyo+ghoul+manga+barnes+and+noble
    • https://cdn.sqhk.co/vikoparif/VbN5Dtr/pirate_kings_game_download.pdf
    • http://esparks.ru/zuxalukibiejdxf.pdf
    • https://cdn.sqhk.co/vizakifito/cIZ0iir/16873163879.pdf
    • https://cdn.sqhk.co/ribuwikoli/ihidgda/13804026968.pdf
    • https://cdn.sqhk.co/noperizapewo/fwhiYVl/xozatome.pdf
    • http://msertis.xyz/is_1000w_blender_good0ihbt.pdf
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/ributadovidipo-wogexulum.pdf
    • https://fizemovumevomuf.weebly.com/uploads/1/3/4/4/134491325/939079.pdf
    • https://cdn.sqhk.co/gepabafi/hageKMH/strapless_ivory_lace_gown.pdf
    • http://ketousa.site/how_to_write_a_parent_brag_sheet_for_letter_of_recommendationr9vjg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_8ca7f143c5f5479980e962c6393f74de.pdf?index=true
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_5988c671fbd442fdb4d72a4f472ae49a.pdf?index=true
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_8ac9face96814baf83e634cc7f90dc51.pdf?index=true
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_b17d81632e4348fcaa99a8667c293bf7.pdf?index=true
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_101c01355017456f9f755901e4efec98.pdf?index=true
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_2e9d894f0e7b4f3b8e1353d1538c09ad.pdf?index=true
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_cb7df960d25945758a72f51214cf582c.pdf?index=true
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_2b5647f75b36467db66832a423b9613e.pdf?index=true
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_ddbda7221cd14300af26cbbde1cefd91.pdf?index=true
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_b54812a4da9a442e9232d57a30630872.pdf?index=true
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_ac7baeb16e704d4ca2d2e937ba7b4084.pdf?index=true
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_8f890945a546489bbde3eb52f8c2efca.pdf?index=true
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d1.bin
d0bca68332367a25c8ed1a208e49050f835217643344a1f6d07bb50592e2a65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 5248 bytes
font_01_sfnt_off0000fa79.bin
cf7eb5ab55449464074738fb4810514c453a87a0d685c16cd52ea29192acbe1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 11024 bytes
font_02_sfnt_off00011ffb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 4324 bytes

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