Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba2b2cde07b4be2…

MALICIOUS

PDF

89.7 KB Created: 2021-03-16 04:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b14a909936a4c4700515719fea15fe97 SHA-1: d5a06f240f9e8df411997a637aab30ad71e892cf SHA-256: eba2b2cde07b4be2f16da722c3a834904b323caa1b76144fada447abab5e724e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's part of a larger phishing or malware distribution scheme, likely initiated via spearphishing.

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.
  • 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://soxebez.ru/wix?keyword=law+and+order+svu+sound+button PDF link annotation
    • https://budoxaku.weebly.com/uploads/1/3/0/8/130873914/5ccf1c6a4989c.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/nepibos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_603f2baacb092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5ffbb0b8402a4.pdfIn PDF document text
    • https://zulukewawebipu.weebly.com/uploads/1/3/4/7/134745728/kamex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_6045e6a8e0f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370319/normal_5fe117d819b5f.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/fakoko.pdfIn PDF document text
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/tulozujowolov.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/nodetuxapabara/nawivam.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_dee5c319f3714a56840634f96464d6a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/36587827957.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_d870275f2eef42d692c0de4d3ece4e56.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_88014cf7b3234b0ab73a1494d0d08903.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_2c40a4fe5a714c25a1297483a6717ac3.pdf?index=trueIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_ccfca332e98c4233ab1ac0b4800c1c2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/89341863666.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_9ec1843b8013445186fa155fc34d119c.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_d909cd0ea13448058a2fbcf4a0530182.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_3083d80bb6e74202b7cfc179a74a4097.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 5020 bytes
SHA-256: 8ecb591b55a117a757603daffc4aab79e4717ba02b56f77ff0edf9653a3d849d
font_01_sfnt_off00011bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAD 11660 bytes
SHA-256: aeb00735672c37eb7fa8443e8934ea900993a7945fd500d4c78e2faf56593956
font_02_sfnt_off0001432b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432B 16416 bytes
SHA-256: b1a7be413c16529a3efb36790fb1ede9dbc47b99b1dcf399fe3ce16d881d47c9