Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a8ede1514a9edc…

MALICIOUS

PDF

84.4 KB Created: 2021-03-27 11:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3185a1f5158c211c3a8b61ba5593144f SHA-1: b8da59c43f212f69bff3dd34f3e6bb1cd871ab47 SHA-256: 34a8ede1514a9edce0970f8ccff2be06099ab783f8b8c0fc4e93eb0d05c548c6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector link to malicious infrastructure at 'https://yafferge.ru/award?keyword=article+of+association+pdf+notes'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics suggest this PDF is designed to lead users to harmful sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=article+of+association+pdf+notes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_60306f8fca83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_602d2dd18ebd3.pdfIn PDF document text
    • https://cdn.sqhk.co/zebekufalafi/dezsfih/badminton_tournament_planner_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/sibsigO/chyawanprash_song_bhavesh_joshi.pdfIn PDF document text
    • https://lipuguxe.weebly.com/uploads/1/3/0/7/130738524/c94c68da2a11.pdfIn PDF document text
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/3718765.pdfIn PDF document text
    • http://tasefuvakol.22web.org/wofilozuzetinupatefuvisos.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/7949408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410956/normal_60020fcf72d47.pdfIn PDF document text
    • https://mapetafuje.weebly.com/uploads/1/3/2/7/132741207/9174015.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/kareladaxazurefem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_6038411b1c212.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://s3.amazonaws.com/lovetijif/computers_in_human_behavior_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/will_solicitors_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/pidafuwuraw.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/doguwaluludevot.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/gelemegerevarimanajonogil.pdfIn PDF document text
    • http://zotodigigaki.epizy.com/93173951438.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/invisibility_technology_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/viva_video_mod_apk_4._5._8.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/best_book_for_probability_and_statistics_quora.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_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 4928 bytes
SHA-256: 49f7675f02eaef8014d0e468df516bcf375135b30973cd7bd55ff2304cf0c1db
font_01_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 10940 bytes
SHA-256: 4e84420ae520e8c2e73e17787a248b21951978e6021b12d392d1dc6319649358
font_02_sfnt_off00013609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13609 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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