Malicious PDF — malware analysis report

Static analysis result for SHA-256 11115fd705dcb185…

MALICIOUS

PDF

72.5 KB Created: 2021-02-24 22:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bf966b7140d9ba0b21c3cda3c4f04e1d SHA-1: 830dddf003c503eae0674d649d76f0d3164ae5a7 SHA-256: 11115fd705dcb185d995f77609ec3e042e7d12f6e59442e1163aa21377b66dc5
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely related to phishing or malware delivery.

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 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://maypoin.ru/strik?utm_term=the+boy+in+the+striped+pajamas+chapter+4+short+summary PDF link annotation
    • https://cdn.sqhk.co/loganidob/gigjbii/nebetarovejomaz.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/VNYprie/magic_snake_ball_anleitung.pdfIn PDF document text
    • http://gebajajax.22web.org/angular_formgroup_add_multiple_controls.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/7078901.pdfIn PDF document text
    • http://tikovg.xyz/cheat_droid_root_only_pro_apktrvbi.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/adgf0if/gold_and_silver_prices_per_gram_today.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/gadopatebejuf_bodomutusazejo.pdfIn PDF document text
    • http://jepekimeba.iblogger.org/vubatatexesusunim.pdfIn PDF document text
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/8688716.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/my_bowling_3d_gamer1by7.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/35874368614.pdfIn PDF document text
    • https://gatelixepa.weebly.com/uploads/1/3/1/1/131163507/2840129.pdfIn PDF document text
    • http://igcopyrightverify.com/11306424063905za.pdfIn PDF document text
    • http://maretexojud.66ghz.com/37146139794.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/suxiweke/b_ed_form_2019_kanpur_university.pdfIn PDF document text
    • http://xoxigibutu.epizy.com/film_tamil_website.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/27181850251.pdfIn PDF document text
    • http://mirajiletumumi.epizy.com/31615867456.pdfIn PDF document text
    • http://jilagikudi.rf.gd/dakijakawikujuzodegev.pdfIn PDF document text
    • http://kasegek.rf.gd/kakole.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_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 5636 bytes
SHA-256: e34577a5359c1062c6ef8db5ab2da5f5ed643caa02f320a52f04aa9cdd44908c
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10140 bytes
SHA-256: c31595a97a3c5042a807429c39ffa95c8148ffffb2cdf15e841d036d2ae65a4c

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