Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d7f4c188260740…

MALICIOUS

PDF

83.1 KB Created: 2021-02-19 13:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 76ceb76ea819df1e52fb2bcdb77073c1 SHA-1: 216c17e920cf278be39489a8a17d472786bd0079 SHA-256: e8d7f4c1882607402059ff0c75f991465e220cdb113d525f9743a745da2b6ea0
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous external URIs, with a critical heuristic flagging a mass of external PDF links, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/strik?utm_term=garmin+nuvi+55lm+gps PDF link annotation
    • http://m-laskin.ru/hana_cockpit_2._0_guide4clnv.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/bidafi-tasedekinupux.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/846736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369187/normal_5fe26b4fa373e.pdfIn PDF document text
    • http://aduo5.online/el_arte_de_no_amargarse_la_vida_descargar_gratisx6gvh.pdfIn PDF document text
    • https://sofifego.weebly.com/uploads/1/3/4/8/134899758/25924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387582/normal_602e2d1dadf66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374689/normal_6005ca9d576db.pdfIn PDF document text
    • http://fortysgjdk.fun/xilolisitidzzp43.pdfIn PDF document text
    • http://studytogether.fun/onmyoji_arena_guide_apkm5n7g.pdfIn PDF document text
    • http://ita-yog.space/cute_yellow_background_for_iphones1be0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417025/normal_5ffe62448ac9a.pdfIn PDF document text
    • https://japipimimobuxi.weebly.com/uploads/1/3/1/0/131071183/3649561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajezife/b_a_pass_2_movie_full.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/google_chrome_dev_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/78141599182.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/82140350119.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/information_about_computer_components.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 5352 bytes
SHA-256: 30156ca22a99d197355a45cf1d72e1b11d181be5eb63252bc856b6470aa6a76e
font_01_sfnt_off00011b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 10712 bytes
SHA-256: 02d936b22846e1c7c8e4e22b8d4f9607df50c014aa58babc15e0e0ddf290d35a

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