Malicious PDF — malware analysis report

Static analysis result for SHA-256 91827543b77c939a…

MALICIOUS

PDF

82.0 KB Created: 2021-06-13 00:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29a62c1bce3b2001ed294cc29e2d4ca0 SHA-1: 08e2e666a0669003ff13739bc928129a0f96a9f1 SHA-256: 91827543b77c939afaba4f327107bdba8b962941815c4e0593b48606f0df1cdc
164 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, many of which are benign, but one primary link points to a suspicious domain. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://garglob.ru/pbw?utm_term=kis+kisko+pyaar+karoon+full+movie+hd+720p+download
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/vezexago.pdf
    • https://samugoruzi.weebly.com/uploads/1/3/7/5/137517920/wizojovewef.pdf
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/joloruzuba_mofoj.pdf
    • https://kubinivoboduwu.weebly.com/uploads/1/3/4/6/134601548/8460844.pdf
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/potufurep_mizezeguzasivor_puliropijive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/01d7e01b-b87f-4518-8d2c-67ff346de6e6/temuzagepimoraxeloji.pdf
    • http://tubekikewabi.pbworks.com/w/file/fetch/145049322/tamil_movie_trailer_2019_download_isaimini.pdf
    • https://uploads.strikinglycdn.com/files/af9df54f-4579-4696-9b23-e289405ecf12/fading_suns_pax_alexius.pdf
    • https://uploads.strikinglycdn.com/files/a09e9dc0-98d2-4179-9877-d89b551d4bb9/sig_sauer_e29r-9-b_p229.pdf
    • https://uploads.strikinglycdn.com/files/5382c74b-cd37-495f-b04a-34e50f0ff0a0/57094215998.pdf
    • https://uploads.strikinglycdn.com/files/cdb38493-c3d0-4b77-bcf0-59726e567b4e/j_alfred_prufrock_poem_analysis.pdf
    • https://uploads.strikinglycdn.com/files/c96baf80-4407-4543-9355-0c3f1fee2414/the_way_things_work_now_barnes_and_noble.pdf
    • https://uploads.strikinglycdn.com/files/af950582-9ff4-462c-bb03-cc14b40b9a2e/25218070737.pdf
    • https://uploads.strikinglycdn.com/files/2743f88c-b2fe-4c66-b065-1d074a3b7ef3/wumazegapunaborek.pdf
    • https://uploads.strikinglycdn.com/files/2bddc020-045f-4dea-9801-f50fa03541a9/sigma_400_bike_computer_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/dc924a89-19d4-4c5e-9162-edc70a5ef8bc/tomusopomododeto.pdf
    • https://uploads.strikinglycdn.com/files/d059c228-3831-49f1-80b8-595a60d69ccb/how_to_answer_interview_questions_about_customer_service.pdf
    • http://jotoxipigi.pbworks.com/f/kanda_sashti_kavacham_lyrics_in_telugu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://youtu.be/tDRG4KUz3bM��Watch
    • 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
    • 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_off0000dabf.bin
ededb1fafb2a79017bd6d72b01bafbaf9bc65982df5f5e65ed59a783680ae74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 5724 bytes
font_01_sfnt_off0000ee2c.bin
bde1d5be2cc6f653a57d9b17e709f31afe70132191e6b57adff00d6a62ef7c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 11100 bytes
font_02_sfnt_off0001145d.bin
206c24822899990f4d25ff4d7ea62b5beecbf07268def0ba09fc526f5e848a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145D 16396 bytes
font_03_sfnt_off00012a57.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A57 4324 bytes

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