Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18ff1d050a00048…

MALICIOUS

PDF

69.5 KB Created: 2021-02-12 03:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc84d8a1750780d75f3dbebce45ad925 SHA-1: a0a833617c1c9c2e7b58f52bc7d061c687eb0815 SHA-256: f18ff1d050a00048b5cc46d74d8cc12b6790fbf0c896df68f39105bce7a016b0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=fishing%20guide%20school%20gi%20bill PDF link annotation
    • http://rostov-mobile-doctor.ru/vifodazenufutz6c.pdfIn PDF document text
    • http://reliables.ru/25315688500cbb5.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/edkTgdq/mindset_synonym_wordhippo.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/vufoduxizogumin-gisuwirupubol-lamusofutudibe.pdfIn PDF document text
    • http://accface.in/652967142649ul7e.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/gizabadoledowupemalamolesg8p02.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/gtXibXv/red_ball_2019.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/jamotenug.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/ODgdngd/697270199.pdfIn PDF document text
    • https://xegoratan.weebly.com/uploads/1/3/2/7/132712572/rapoz.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/difghrq/hockey_battle_mode.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/vebogotexaf/bracket_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/complexation_reaction_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/fluke_325_clamp_meter_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/endometrial_hyperplasia_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/wopumesazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/93272273566.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/60745510424.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_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 4988 bytes
SHA-256: af2307408a04af03fa8ac4eb7b04da09f29c8ae1e2fb875e5a92c066d3217c07
font_01_sfnt_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 10308 bytes
SHA-256: 5cc98d623f08cb0e7431ae57de4637566f5bd33e2d17c0e2abc8ea2e3676e038

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