Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48ae0691297eb46…

MALICIOUS

PDF

57.8 KB Created: 2020-12-06 17:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed2896a3074a9f636c37e54ea9139bbc SHA-1: d23ebce4c2ff329d8aee75d3b7036a22c421e4fc SHA-256: d48ae0691297eb464cc81f09dea0e8a6066ed5e3aef66613bac4e3e1f3fc9e06
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was identified as a phishing lure due to its image-heavy nature and a clickable action triggering a redirect. The primary malicious URL, https://trafftec.ru/123?utm_term=adding+rational+expressions+khan+academy, is embedded within the document, suggesting an attempt to trick users into visiting a potentially harmful site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 57 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafftec.ru/123?utm_term=adding+rational+expressions+khan+academy PDF link annotation
    • https://lasonitukaxo.weebly.com/uploads/1/3/4/8/134889758/4840877.pdfIn PDF document text
    • https://bufetijakuvarit.weebly.com/uploads/1/3/4/8/134878832/vujoxepuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc169478139af037648d9ed/t/5fc4d6d7cb3e0f5771e7916d/1606735576204/crystal_report_null_value_0.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77b74849d1727bc12ab1a/t/5fc90aeb3da8de5558247b26/1607011052282/hashtags_for_likes_and_followers_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc2e254f8cdb769c64307ea/1606607444752/28459201652.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf521d9d7936484084d2d2/1606373918203/zexon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a12c1d-342b-4dd3-abe8-65621b79ed2c/anaphase_2_nondisjunction.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fa33c6ccf69f354fa8b/1606373284224/kingdom_hearts_dusk_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/robin_hood_oxford_bookworms_starter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dfce0f-5edf-4067-90f0-581d8170eaf8/divejaxipa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529855e8e827d42a99b3c/t/5fcc414b662d5e24e095d999/1607221579970/top_50_english_songs_mp3_download_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/free_after_effects_templates_3d_text.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc655159955c744b5606702/t/5fc86d8043b29e7a5af56a26/1606970752726/griseofulvin_ultramicrosize_interactions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b48024-e606-46fe-8352-0877c18fcda5/55921529995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986995e3-c0a8-4d1e-87de-b8b310d46d97/79550555398.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67f07acac6192ab92b8d/1606379505501/82050092251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c7336d-5221-4a3b-8b00-3cc3c07452c6/rokagevulumone.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_off0000ae3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3D 5708 bytes
SHA-256: 1ca3edc0a33269a9b0b9d7df59ed72dd89e5d88942fccfe6ec2afdcaaaeeb4c2
font_01_sfnt_off0000c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC191 7276 bytes
SHA-256: 12abd77504c3539bcc81fff1ef30a5f55f653b3f8669d024586be8c392b4f68f

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