Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f68940ec4da6c72…

MALICIOUS

PDF

88.7 KB Created: 2021-04-06 08:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 618cbabe395627dc927eabb73007b9cb SHA-1: c664106e18407268927bdd7421f0028ef9ad778b SHA-256: 0f68940ec4da6c72fa5724b603e10d1ace9e44d3594fb61a3791094ff9736f6e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://lozipotod.ru/wix?keyword=stradivaro+60+sewing+machine PDF link annotation
    • http://malanefire.sportsontheweb.net/42494572285.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/jatuwikumufun.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/8775927c3ffd03.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/xarawupikinivo_mutuburoje.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/wuwid.pdfIn PDF document text
    • https://wowaximemufa.weebly.com/uploads/1/3/1/4/131453960/lawevige.pdfIn PDF document text
    • https://zopamege.weebly.com/uploads/1/3/5/9/135966764/pukegojowelaj_kuwuvabukinimuv_denedenuva.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/611c7ab60652.pdfIn PDF document text
    • https://silukirajewulo.weebly.com/uploads/1/3/2/6/132695932/xusuxubenot-dusetit-zikevo-tufugameteviso.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/adobe_scan_scanner_ocr_app.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/the_giver_chapter_10_11_quizlet.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/bokelur/bunapuzebumomesewanozeko.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/basatufijagubojif.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/63316297433.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/baxal.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/sulamokukuxuvozaj.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/accountancy_class_12_state_board.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/sat_chemistry_subject_test_practice_book.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_off00011c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 5872 bytes
SHA-256: 8aac66bc6b5366758c51e93cd192a3f0581f7b555f6da584a9bd4cc2c471d183
font_01_sfnt_off00013022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13022 11132 bytes
SHA-256: 8b53e90cb09d5af1e31628996ee72f99f66333a27e90dff776ecd9cdc655ab38