Malicious PDF — malware analysis report

Static analysis result for SHA-256 614a675fd4327f02…

MALICIOUS

PDF

76.7 KB Created: 2021-01-31 01:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a38a83a3dffd16ccb0f6aec652c53b59 SHA-1: fe08df7252baa43e6f8773d7019adf3ccecd45ed SHA-256: 614a675fd4327f029d87d4fd8932e2c552eef4088ba1edcd3c0263c1d6721dd8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO abuse. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious workflow designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://seumenha.ru/123?utm_term=guildmasters%2527+guide+to+ravnica+pdf+traduzido PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450513/normal_5fdc729aefd35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457014/normal_5fe44b2ee8c2c.pdfIn PDF document text
    • https://jadowusirufire.weebly.com/uploads/1/3/2/7/132740355/0112f11c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ff5b72b3bc89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488339/normal_5fd12a9911ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5feb08bda756a.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/5a74f90e29.pdfIn PDF document text
    • http://difodalutovirub.iblogger.org/ibps_rrb_exam_admit_card_2018.pdfIn PDF document text
    • http://mipefukonuvav.iblogger.org/angry_neighbor_2._6_apk.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/1e556b.pdfIn PDF document text
    • https://ritesevegozuvij.weebly.com/uploads/1/3/1/6/131606822/1775031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391302/normal_5ff97ffe46987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418747/normal_5fe4de0107c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5ff8d3ce4350e.pdfIn PDF document text
    • http://pewavari.22web.org/worksheet_3._6_possessive_adjectives.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokogemuzaraw.epizy.com/imperial_conversion_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/12432915702.pdfIn PDF document text
    • http://dijiwag.epizy.com/isaitamil_movies_2019_tamil.pdfIn PDF document text
    • http://kojusefum.rf.gd/s3_folder_aws_cli.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/jerobun.pdfIn PDF document text
    • http://muvelexadaw.epizy.com/wrong_turn_movie_collection_moviesda.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_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 5648 bytes
SHA-256: 30e3f8b50d348136c1c34515d7172a9c50ac815cc7d62a826beabee52073f839
font_01_sfnt_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 13428 bytes
SHA-256: 8d459ea74b115de65e05f221630b7dd124ce13ee1dfcc6790abf8cc3e5a07420

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