Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f09739c56d14a2f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-07 22:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 477d311bae8f09cf4d3c8847257086ae SHA-1: 3ffa43565039520673525b605a8b418b25050f1f SHA-256: 0f09739c56d14a2f73124d7d5a426c487871742e387883d7b6943f6cbdcf8b0d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external websites, some of which are hosted on disposable domains. The embedded URLs suggest an attempt to lure users into downloading potentially harmful software or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://resalured.ru/wix?keyword=powerdirector+pro+apk+ios PDF link annotation
    • https://cdn.sqhk.co/sofizagumup/ggvW1ij/evowars_io_online_spielen.pdfIn PDF document text
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/2070519.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/3879046.pdfIn PDF document text
    • http://dududuw.mypressonline.com/good_books_for_12_year_olds_boy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_6043fd21ee8d4.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/german_grammar_books_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/revowemerem/7iefojh/78531395860.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/47863144533.pdfIn PDF document text
    • https://xovokemopozok.weebly.com/uploads/1/3/4/5/134579322/numeg-napajusumodo-bixefomegixuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_60158c18d114a.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/7jbhdln/37422908845.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/2018_first_aid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budobilososuw.rf.gd/84401213878.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_cdea815870024de8889ad8d6a3720818.pdf?index=trueIn PDF document text
    • http://batapijas.myartsonline.com/81955584857.pdfIn PDF document text
    • http://davutawopoban.epizy.com/ptet_college_allotment_list_2019.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_b74400d3d39742c986c74bbc65aca44c.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_c0b4ea4ec92c456eaa790009709eb1de.pdf?index=trueIn PDF document text
    • http://zozezad.epizy.com/b._ed_exam_form_fees.pdfIn PDF document text
    • http://pudopidurisego.epizy.com/give_me_liberty_chapter_12_quiz.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_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 5192 bytes
SHA-256: 40adcd232de17ee3d47da43dcd197d5a9f28a43406fa2eecceb25daaecde461c
font_01_sfnt_off00010aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAC 10004 bytes
SHA-256: 0ee3e1621960a889716c97272b37e43b4ee65577985f1d7b7a31ebb5579f5c97

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