Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3345c5d8819bfc9…

MALICIOUS

PDF

67.9 KB Created: 2020-11-20 00:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 80d2e6303c4afdd0ec7025ff6e8ba06d SHA-1: 92be8a197c25eaca3fa4e2174d960ee4efb34718 SHA-256: f3345c5d8819bfc9411bd48ee69960918e67b6747035864b0ec5e29d71e08e35
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://traffnew.ru/aws?utm_term=caller+tune+jio+music+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5fa6f7fe766f7.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5fa5d2b4dfd58.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/098c67da8cdfef1.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/vinase.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/sejerugefoluzoxoko.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/rimutupizo.pdfIn PDF document text
    • https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/1796527.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/risite.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/00b479029c67f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5f9ecbd6a6bbb.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/1241dd16-0444-469c-ab89-7592f373c1a0/central_baptist_hospital_lexington_ky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a2347e-794a-459a-a33d-666a20990f7f/tevigewavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991bb8a7-9575-49ab-825a-7af07710260f/chapter_9_chemical_names_and_formulas_review_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ca6cb0-e0ff-4e9e-a53f-84f1441dae8b/tajebelavafimenitipaxis.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_off0000cd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3C 5060 bytes
SHA-256: 0ceab9e49f5f1eb324462ea3b8d0fa7cfe185fe6ec2792c7c1313decf98c7e9d
font_01_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 10724 bytes
SHA-256: 85a0bd8248b9ba7064f53714073be61d4f3963501fe6d9c991f4c47fd2a35921

Open this report in the interactive analyzer, or submit your own file for analysis.