Malicious PDF — malware analysis report

Static analysis result for SHA-256 02558f6bd710da58…

MALICIOUS

PDF

308.4 KB Created: 2021-03-10 08:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3c090a1c140c0b31f1327791e3e0449 SHA-1: 583fc0dcbdd8f2e45af485e681a5b8fa9cf63d04 SHA-256: 02558f6bd710da58e7b06af18a03527f313f3892efb6ec61562b262b6de0842e
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document exhibits multiple social engineering lures, including a browser extension installation prompt and a request for recovery secrets, indicative of phishing or credential theft attempts. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures point towards a phishing attack designed to trick users into downloading malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/aws?utm_term=firefox+48+mac+download+deutsch PDF link annotation
    • https://cdn.sqhk.co/kixagixupo/e5diMgf/baby_flashcards_for_toddlers_printable.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/bb9d5b931c71.pdfIn PDF document text
    • https://wilewefat.weebly.com/uploads/1/3/4/2/134234777/xosezotemadojo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/bLsWhhp/diaphysis_definition_anthropology.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/5975892.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/lavog-tubufanisoli-xugotativalur-sogadu.pdfIn PDF document text
    • http://jakufodunod.getenjoyment.net/ashrae_handbook_hvac_systems_and_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/hyas48O/tawemiwegedirapojuwuw.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/54269f4522.pdfIn PDF document text
    • https://xagomutub.weebly.com/uploads/1/3/4/3/134321984/boloxa.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/dutonufobumob-fenesotukawipu-sekavi.pdfIn PDF document text
    • http://sopidemeleket.mygamesonline.org/activity_theory_of_aging.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/gaxititoj.pdfIn PDF document text
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/cb4b0d6.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/maritime_law_enforcement_manual.pdfIn PDF document text
    • https://pixipesigogod.weebly.com/uploads/1/3/4/3/134370637/8bedec1d9c9.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/xegos.pdfIn PDF document text
    • https://vizifota.weebly.com/uploads/1/3/0/9/130969876/5294ede116d1e.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/6999087.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/57s57ge/music_ballet_class.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc286d1d-cb16-412e-b990-1695b3f59cd5/97416670161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945028ff-6ffa-45c5-99c5-6d9852674ea9/40598550033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad30eb0-4930-4e90-a8e4-24af0e44cc90/presonus_central_station_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98a9fbc-4b76-42e4-aa29-32bade8a76a1/dusawulanujiserenesono.pdfIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/how_to_mix_aveda_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee50f2fc-dafe-4715-bfcc-8137065063ea/jepugujulagidovixovupe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00047c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C0E 5656 bytes
SHA-256: 697761262595a834c0ecfdb9612d6091c36aec79f7dc4a1c87dd2295003c1043
font_01_sfnt_off00048f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F3D 13204 bytes
SHA-256: e13e3e5c526fd82acc5968c6ec72d16da67fed3cf9f718cadfe73b08469d4b77
font_02_sfnt_off0004ba74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA74 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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