Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3abb65d4aabbcd6…

MALICIOUS

PDF

76.7 KB Created: 2021-03-09 23:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5ce76add6ccb5fdc202a9c48d4daa3ba SHA-1: b32b9224b2ea17b1b3722516a4c25aaa6f9c6882 SHA-256: e3abb65d4aabbcd69e11f9a9730591f18f803c0bfd713b3f3160c152e21b247e
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 0.9992

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://maypoin.ru/award?keyword=conjugaison+avoir+a+tous+les+temps+pdf PDF link annotation
    • https://cdn.sqhk.co/tusujoxaseru/jdjanhj/home_depot_paint_sprayer_reviews.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/tejatefadosa.pdfIn PDF document text
    • https://ravuluzezufex.weebly.com/uploads/1/3/5/9/135956854/kasinuxubapigo.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/hihdfjc/72528860129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fe8c2f721338.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/gij8jhq/mepalakigusaromabagofelus.pdfIn PDF document text
    • https://maxolesaso.weebly.com/uploads/1/3/0/7/130776327/kurabevazebizokuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_6045022aa6dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_60323c48b3802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_601248381961a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448540/normal_5fe11671b0fe2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_28a291237c4a4de0a475789c15f52d5d.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_ffa0b6aa5a8242d89ec9eb9611f995ac.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_88690f470ecc4a73b963de6fe0cc1544.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_e59e024ccb0f4410af507740cfaced87.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_52697c37e0a749ba9345c73c16a285bb.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_d9d8f86799ba4cb1a560b6941ab0719d.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_ccfe68d4f12d4d648366a120756b1241.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_128f9becdef9416193269a59813bbf6b.pdf?index=trueIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_c59e9ec06862498b9e40faff53532df3.pdf?index=trueIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_126fe59bdc54411e8d9af6fbfd3a9667.pdf?index=trueIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_b18f33e774a34d6991b73650b5307dca.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_0da094ec8cce4c7e9891e29b2027643d.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_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5404 bytes
SHA-256: 905c000aa3af910b07f006297e817e2bbd082ee87961ab674a9b092adc8aa377
font_01_sfnt_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 12628 bytes
SHA-256: 7ad2651807cc135fb0b160ae722d8f88fd3d75981257c48baedd77f39c6ef2f7