Malicious PDF — malware analysis report

Static analysis result for SHA-256 70271d95cb16587e…

MALICIOUS

PDF

74.3 KB Created: 2021-02-17 20:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 09775c6db749863841182007f11974ab SHA-1: c0ba378d31818f3f67f951ef68ac915d64cd7eeb SHA-256: 70271d95cb16587ecaa86c7446ef5f72daf0cedb9fc2b7be225629a1811e6358
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs, including one flagged as potentially malicious, points towards a phishing or malicious redirection attack.

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://baarspo.ru/wix?keyword=duel+links+hack PDF link annotation
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/7bc91152ad1b76.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/bheShdM/adamantine_armor_3._5.pdfIn PDF document text
    • https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/c80cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497078/normal_5ffaef44de58f.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/xHsqxjg/ducks_unlimited_auction_prints.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/XhjAhiH/interactive_coordinate_plane_plotter.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/gghhMTN/cake_maker_cooking_game_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fc79a55d99c7.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/1356737.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/dejodom.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/videoder_apkpure_free.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/6980756.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/jumedemimo/62244269096.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/nimavalekomave.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/kendo_ui_grid_custom_template.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/sheet_pan_bruschetta_chicken_and_veggies.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/forixomox.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_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 4856 bytes
SHA-256: 7122950087cd6e38920c7e881f3505df9823497da99429a5b2d7afc28d1d5ffe
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 10504 bytes
SHA-256: 4938ccdbcd1238797129b223c08a1b96d35cae2caf803a4d3e06bafa5e378314

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