Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe17a0a74fda1f3c…

MALICIOUS

PDF

76.7 KB Created: 2021-02-14 14:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5251c9ca0ac786312464046dfd1cb0f3 SHA-1: e0b91c67c50ec451436cdc7e028c8db854e98b17 SHA-256: fe17a0a74fda1f3c77fbdf34685d9a136af1543b8ae888fb1372208754cd2ea1
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm hosted on disposable domains, with a high ML score and ClamAV detection as a phishing trojan. The embedded URL points to a "Clash of Clans gem generator website", a common lure for phishing and scamming. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely to redirect users to a phishing or malware download site.

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 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://jottigo.ru/wix?keyword=clash+of+clans+gem+generator+website PDF link annotation
    • http://kiguporut.iblogger.org/ecology_quiz_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601732f60c38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_60141ab1ea9c1.pdfIn PDF document text
    • http://rusedewafizurap.66ghz.com/dobifeluzijezapotivim.pdfIn PDF document text
    • http://antonioita.fun/public_relations_writing_and_media_techniques_8th_editiontjvs6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_5ff267a2821e5.pdfIn PDF document text
    • http://sreview.online/adding_sheet_ks157x5k.pdfIn PDF document text
    • http://nout-sale.site/titigitatokuzcc5rk.pdfIn PDF document text
    • http://morasufas.iblogger.org/collectible_doll_value_guide.pdfIn PDF document text
    • http://wurigakisedepov.iblogger.org/ms_office_2013_powerpoint_themes_free.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/seriposuj/xiwir.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/aishwarya_song_video.pdfIn PDF document text
    • http://dekutob.epizy.com/que_es_el_languidecen.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/72575258332.pdfIn PDF document text
    • http://xesapekaf.epizy.com/xizogu.pdfIn PDF document text
    • http://kevakop.epizy.com/kekemalupez.pdfIn PDF document text
    • http://vegewamofuxa.rf.gd/wedadasobubisezo.pdfIn PDF document text
    • http://wezikadedikenev.epizy.com/56222023121.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_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 5432 bytes
SHA-256: 368eea47c1e36d3b42578a786cc8dbf9b1f3149111723c2fefb469537375823b
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 10504 bytes
SHA-256: be058cb8e9396d6786b6e098d2dab8d5bbf761b000f946f19943e2a2925e75f9

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