Malicious PDF — malware analysis report

Static analysis result for SHA-256 796bb5c5a1a0db1e…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 14:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8939d29682e3c5f2f20972b5a6b4c488 SHA-1: be65e5ac4d6fdb94f5cfa91e7bd9282812b86ee8 SHA-256: 796bb5c5a1a0db1e7370aac0f0d3f95035b5376c7a73b2fdb1b1006a9d6fcd73
166 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs, including one pointing to 'mezovuduw.ru' which is associated with a search term for resetting an Android box, suggesting a lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack involving password-protected archives, a common tactic for evading gateway scanning. No scripts were extracted, but the presence of embedded URLs and the overall malicious classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/123?utm_term=how+to+factory+reset+t95+android+box PDF link annotation
    • http://sentytld.online/spectacle_island_fallout_4_can_t_use_workshopsu4jq.pdfIn PDF document text
    • http://slimerecipe.org/rimelofijofunupenuuq10r.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/navpers_15665i_us_navy_uniform_regulations.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/jgQhggh/xopodiro.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/7qhdzid/xusilexezekenowumesumira.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/windrock_trail_map_online.pdfIn PDF document text
    • http://hyipinvest.site/journey_to_the_center_of_the_earth_full_movie_download_in_tamilyogim03p6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_5fc8e8272027a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_6022602ccd1e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aa71669c-214d-4272-9b05-b430bfcadadc/construct_2_free_version_download_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8f4893-de76-489d-aeef-817fa86aba5c/queen_bohemian_rhapsody_piano_cover_sheet_music.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/1201759865.pdfIn PDF document text
    • http://zaluboxif.epizy.com/architectural_working_drawing_examples.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/valizowuxigirozitapi.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/lanixidupenup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82270e8-4086-4c0e-a18b-8bdb7d667a87/nurutizekamimi.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/vumerikawumugoxa.pdfIn PDF document text
    • http://numorikuge.rf.gd/is_big_little_lies_2_on_dvd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 5416 bytes
SHA-256: 05c86b73a1faaca91f0fd549faed841889adb427b52caa9554eeab7d64a3da90
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 10648 bytes
SHA-256: 3aaa866848c3aa24bca8b9d8bbc38965df1c4751d217a91f16421cd4851f18a8
font_02_sfnt_off000136a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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