Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5147ce224ee30e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-19 06:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 253981c9d7c2bb2f4b46fa7ed9c99ba8 SHA-1: ab27390ddbd607282350ee0d31edd5c474f442cf SHA-256: fd5147ce224ee30e4e5fda1b598674f04599fcfb9a767477c1f660a10a584e31
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=paper+cutting+patterns+butterfly+pdf
    • http://fuvafutiku.22web.org/xetujupudifufilogekuduk.pdf
    • http://pro-komp-master.website/195849597275ahb.pdf
    • http://creamwalls.online/wendys_chocolate_frosty_calories_medium083f4.pdf
    • http://konenugulelari.iblogger.org/worak.pdf
    • http://jitokinut.iblogger.org/xamudolepoletowej.pdf
    • http://coolvdomaion.online/teachers_assistant_pay_ratenslj6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/67c82176-ff75-469b-8cdd-a6b4e069e5b8/89967726619.pdf
    • https://uploads.strikinglycdn.com/files/aaa375e7-f817-4a75-a578-b9b9c3e9cc7c/pilgrims_progress_book.pdf
    • https://uploads.strikinglycdn.com/files/764697f3-55ff-40fe-a95a-42346a3f4059/twilight_new_moon_hd_hindi_download.pdf
    • https://uploads.strikinglycdn.com/files/80be40d3-b917-4bf1-b451-7b4eeb41df9a/the_natural_bernard_malamud_free.pdf
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_e6f641e44c464b7f9bd5b818adbd9eee.pdf?index=true
    • https://s3.amazonaws.com/jadudusujuje/baazigar_odia_album_video.pdf
    • http://dazusiv.epizy.com/5948599113.pdf
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_1dd65ccaada64584b9bc4b8392a35b4a.pdf?index=true
    • http://jiforexawa.rf.gd/salokiditapepijilexavobu.pdf
    • https://s3.amazonaws.com/fedufiporara/73051809986.pdf
    • http://dokizoj.epizy.com/building_and_structural_construction_n6_notes.pdf
    • http://repajazofuwide.epizy.com/allotted_sentence_formation.pdf
    • http://nadefivetokilak.rf.gd/kixefoxobejez.pdf
    • https://uploads.strikinglycdn.com/files/b49c42ba-1bdc-4520-92cc-f77277078e0f/36443542276.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_off0000e10b.bin
61842f66ad24d146dc12f7882e433003bc1d310f728f345dfc47963a1e19a61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 5564 bytes
font_01_sfnt_off0000f405.bin
95ad394eaea3450ba66d747cee9e618d74b37968b5fdca6fd3e7cac7e599096e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 10724 bytes

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