Malicious PDF — malware analysis report

Static analysis result for SHA-256 30668ba1bb736fa6…

MALICIOUS

PDF

64.1 KB Created: 2021-02-19 01:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f7e5ed60f713293318b3674bd908523 SHA-1: 752fe413843e89c2599cc328d7f454ef9dace5cc SHA-256: 30668ba1bb736fa61886f325a9572f27b16b014f17043eab107815b6fee30f07
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, with the primary IOC being the embedded URL leading to a link farm. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing or SEO manipulation scheme.

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://bologen.ru/strik?utm_term=how+many+calories+are+in+a+dunkin+latte PDF link annotation
    • http://vitrinachel.ru/smbolos_de_electrnica_para_visio7nuje.pdfIn PDF document text
    • http://idealslim-ordina.site/beclometasone_dipropionate_formoterol_fumarate_and_glycopyrronium2e4t4.pdfIn PDF document text
    • http://ronebiwoti.22web.org/70643484569.pdfIn PDF document text
    • http://mon-cmb.best/sushanta_paul_marksheet8sah9.pdfIn PDF document text
    • http://ecoservice-vlad.ru/photomath_plus_apk_free_download_ios2tygt.pdfIn PDF document text
    • http://pejubuga.iblogger.org/betemonimime.pdfIn PDF document text
    • https://tusaluzope.weebly.com/uploads/1/3/4/3/134374665/zotejebapomam.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/mizeteb/whirlpool_dishwasher_adp_755_user_guide.pdfIn PDF document text
    • http://xipixasalor.rf.gd/92181513732.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/bluestacks_apk_file_location.pdfIn PDF document text
    • http://gupunekatomez.rf.gd/ballance_game_free_for_android.pdfIn PDF document text
    • http://tisuvelepep.rf.gd/azure_app_gateway_arm_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/27755666981.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/parametric_and_nonparametric_statistical_analysis.pdfIn PDF document text
    • http://nalumilejoburo.rf.gd/software_quality_assurance_galin.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/filezilla_free_latest_version.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_off0000bde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE9 5304 bytes
SHA-256: 61b3db552af8b5019b583327262fcc551e5e5b54c7287060837f2ccbee5fad36
font_01_sfnt_off0000cfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEF 10264 bytes
SHA-256: ae63cc6af3f9c55baeafb1fa1e384556d3a316236978a2125d99580c6bf1ddf5

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