Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9bee1626e4e015…

MALICIOUS

PDF

85.6 KB Created: 2021-05-15 14:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55660c942fd964a3da19930276b8b670 SHA-1: 6fdfac3f2f82654422dd602c30751cfc4ae8e649 SHA-256: 7f9bee1626e4e01532588e3eb7d3419993a893d6206f6ddae9c90d453b005825
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=spoken+english+online+classes+in+kerala
    • http://zitupow.medianewsonline.com/muroxidagakoj.pdf
    • http://zaxevef.getenjoyment.net/ap_style_guide_date_range.pdf
    • https://cdn-cms.f-static.net/uploads/4369631/normal_6027ba88b75eb.pdf
    • https://cdn.sqhk.co/kosadara/i3Myhho/acacia_wood_cutting_board_bacteria.pdf
    • https://cdn.sqhk.co/worijekegir/yjhbjd7/legapojata.pdf
    • http://kawlites.online/35694435435vh3b2.pdf
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff2cabe0aecd.pdf
    • http://bumumapa.mypressonline.com/dilupanezerap.pdf
    • http://zootime.store/cucumber_api_testing_java_tutorial2daw6.pdf
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601ec7da3f4a4.pdf
    • http://perevod-card2card24.site/xofewozoz5uqn9.pdf
    • http://zisezamerares.mygamesonline.org/a_room_of_one_s_own_analysis.pdf
    • https://cdn-cms.f-static.net/uploads/4450724/normal_6064eb0be226c.pdf
    • http://bamefidev.mygamesonline.org/zogakeniwonisusix.pdf
    • http://freehookup.xyz/games_offline_free_download_for_pc8ykiq.pdf
    • http://fevevafo.medianewsonline.com/21361243527.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tikeresepujel.onlinewebshop.net/58874425548.pdf
    • http://pudosuvosav.atwebpages.com/55333095979.pdf
    • https://uploads.strikinglycdn.com/files/11c0067f-5fcd-40d1-9269-bb753e3bae0d/maytag_front_load_washer_error_code_hf.pdf
    • https://uploads.strikinglycdn.com/files/df647675-b659-4c15-b635-740feb9db4bb/43652334086.pdf
    • http://nerezusilanake.atwebpages.com/51206272272.pdf
    • https://uploads.strikinglycdn.com/files/047ee6f5-371c-4770-8c9c-ffae5fdf14fd/how_to_check_if_a_book_is_ar_testable.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c4.bin
2646abceab50a55757541215516312c7289e36d7e4d432529709e3588563ac17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 5360 bytes
font_01_sfnt_off00012403.bin
490e12725a49b017eae38b9e2c9824985487e80a80865631e24036d88160b852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12403 10748 bytes

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