Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ca06a64214f636…

MALICIOUS

PDF

81.2 KB Created: 2021-03-17 02:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 93423f1c212cb1496a3f75a9bb046b13 SHA-1: 1982e54d00000a2f31d8a91334242a2c2e8398c0 SHA-256: e5ca06a64214f636be7d02b8c89bd0eac89b349b6e5408501ba528ed2104e9ca
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=kodi+17+download+apk+for+android+4.4.2 PDF link annotation
    • http://pomulagija.iblogger.org/compressed_mask_sheet.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/5173842.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/3614d884e09.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/fijenu-woroguromekim-gujugozegujasu.pdfIn PDF document text
    • https://zelopira.weebly.com/uploads/1/3/5/9/135990333/biboviji.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/786e1cd6-cd50-4e75-8151-0c3130a0bb58/36698845520.pdfIn PDF document text
    • http://risuduk.epizy.com/98188718277.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_1841a6b2bc5f4e1db6adf59b57c584e1.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_e3b82965254249e0990df49c3ccbda3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/246d93b1-a2ed-4c06-9b43-f2263a4035ea/85199253308.pdfIn PDF document text
    • http://xijevilofut.rf.gd/79635966073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa3a077-9e4d-4091-ae05-b4589232393b/mekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2737cf6-acd0-402c-85e5-7277ef3a2c9d/warogironeki.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/mnemonic_method.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/64754534440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332e3d51-eb58-4a23-ae20-a18d251f29d3/26544415813.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_37643fd5dcaa40feafb4b478917b68c7.pdf?index=trueIn PDF document text
    • http://jigiwema.epizy.com/billy_ocean_songs_free.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_f579ca00c7234862868ea4324bcdd10a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/python_range_step_without_stop.pdfIn PDF document text
    • https://5593f39e-0a52-4cda-b9e8-711d97d0c827.filesusr.com/ugd/bae363_dfc90ac034844299a4aea6f059f7ab8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/gudagobolejobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d936483b-558b-4798-a2e3-f67bda6c0c35/49342497574.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/kojefaroko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae46c61-b4dc-418f-b661-1e66d39f33be/93946921962.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
    • 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_off0000e7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BA 5364 bytes
SHA-256: 3689175e44000b63dd4b4b2b52cb60b24422d7ee030091eecdbd6a3fc89225de
font_01_sfnt_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 11668 bytes
SHA-256: 9e67d43136ac2b3655f7c2d735d91c5a2bbdc5cf619d38ac3b7ab933279ea299
font_02_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501