Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26486298ba52bc2…

MALICIOUS

PDF

82.4 KB Created: 2021-04-25 07:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4b40596829fdf8a3be72a7bdc166ec1 SHA-1: 70b2c053795f6719895b0656dd328bdd026c7d55 SHA-256: e26486298ba52bc2a04f266350df02925e519d00aec6e2f02cff2a1ae212d89e
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://crophysi.ru/strik?utm_term=what+is+the+plot+of+the+story+hamlet PDF link annotation
    • https://cdn.sqhk.co/gijesali/Ugd9jjX/wadubemavaveperakebuxap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415291/normal_5ffe06a26deeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_6035de77b291f.pdfIn PDF document text
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/0013af7299e344.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/hiheic9/linear_algebra_zero_vector_dimension.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/gif8xhj/waveguide_propagation_constant.pdfIn PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/tenixosi.pdfIn PDF document text
    • https://monotuwisax.weebly.com/uploads/1/3/4/5/134589760/fogopejemaliz_guzafu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5ff5161d8aa4b.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/jgjaigL/wajutefowu.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/1f95e850-7291-4ff8-8ea9-ce6f96866c59/71014717968.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/sufaxatoxoxipefarerilom.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_65f043fed4e74453bfa2d8db94160992.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d77abf-7cfe-4b4b-a805-808a3d024a55/25218095620.pdfIn PDF document text
    • http://lomuxisopu.rf.gd/dututi.pdfIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_269643588af14502bac9c0e75284601c.pdf?index=trueIn PDF document text
    • https://7c2a7e5f-de2f-4207-b822-d971188c697e.filesusr.com/ugd/17f605_8638c37b637e48b4b2f2ef69ef82a2ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc81b5a-b522-412d-8130-1a6d123ca986/wuruz.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_63d988c42eb04cc5be1ec96336881f68.pdf?index=trueIn PDF document text
    • http://pojasosi.epizy.com/detailed_lesson_plan_in_tle_drafting.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_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 5256 bytes
SHA-256: 57c579c19038ba747226c8e3d6d85dc966f63d6af8a20a63846f85d18dd0b053
font_01_sfnt_off00011849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 10524 bytes
SHA-256: 12056710276563049311316ae5eb63ce0c53fc1e5f7bfc8b80fec60be1f9f6be

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