Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba06eb23d26aacb…

MALICIOUS

PDF

72.8 KB Created: 2021-05-17 15:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 18f3c4e2a2f97ece83fd2e1aec8a40f3 SHA-1: dc676e1d3cdab1f39a62d7f5943cb1384b5211a4 SHA-256: 9ba06eb23d26aacb39a93c7749d2d0185edf1ad8320b566b613a24f8237b3385
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to deliver second-stage payloads or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://ponafet.ru/strik?utm_term=how+to+replace+a+lost+nc+drivers+license PDF link annotation
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/sorepenetu.pdfIn PDF document text
    • http://azakalaza5.xyz/fejebojenowifodios5du.pdfIn PDF document text
    • https://zenozuniwilifa.weebly.com/uploads/1/3/4/1/134131556/vidipag_fozixub.pdfIn PDF document text
    • http://pristav.pro/kofegex510z7.pdfIn PDF document text
    • https://dizegeduwawab.weebly.com/uploads/1/3/4/3/134374994/02f9b894c1.pdfIn PDF document text
    • http://navalny.design/suleded55t4k.pdfIn PDF document text
    • http://podarokinsta.site/vunikozadunus9q5w8.pdfIn PDF document text
    • http://islemleriniz.org/building_self_esteem_worksheetssoigq.pdfIn PDF document text
    • http://amsidgi.xyz/mjr_digital_cinemas_corporate_officeqinkr.pdfIn PDF document text
    • http://smartcreditscore.info/73634870356uoahm.pdfIn PDF document text
    • http://smallita.space/722215841723mvw.pdfIn PDF document text
    • http://biotringel.shop/sezozuzadezufanavitvds2p.pdfIn PDF document text
    • http://classkaod.ru/skewerz_annoying_orange_game5mj53.pdfIn PDF document text
    • http://meetsol.xyz/what_is_the_half_blood_prince_movie_about96hq0.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/7cacfb70-c884-49c7-be6d-70f1c880216b/dukep.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_97bdf508a3794c528ae15a4fec65bcdf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7204b526-e9a7-4644-add1-dc5e73821972/59618605707.pdfIn PDF document text
    • https://f0f855fd-29d2-4bf6-9fdd-af1de8d1f91d.filesusr.com/ugd/184831_526f5562286544dbbcd0776afeae7b1a.pdf?index=trueIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_ef52fcc42738417ea192dc4c38f71139.pdf?index=trueIn 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_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 5180 bytes
SHA-256: d1aa80e663994f0369c6346e9576cef2bde76d644c95299aa16e2ece7e404eed
font_01_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10336 bytes
SHA-256: ef1b9617c9d9f0061db799da8f5d651b45900840bcb4e3493c573fb3c99c109a

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