Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7c6eac5f708c3b…

MALICIOUS

PDF

92.2 KB Created: 2021-05-29 01:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f066b67b5c01f6f0688d30c4295f34bf SHA-1: dc90610b0c761a52a46a3eed82b2531d22561b5f SHA-256: 3d7c6eac5f708c3b60961d119de5c3e0d3a6962ba5be83674b1dc9d772d94f02
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The embedded URL, https://lozipotod.ru/123?utm_term=tratamento+fisioterapeutico+hernia+de+disco+lombar+pdf, is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site. The ClamAV detection further supports its classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://lozipotod.ru/123?utm_term=tratamento+fisioterapeutico+hernia+de+disco+lombar+pdf PDF link annotation
    • https://dawujorukola.weebly.com/uploads/1/3/4/6/134683436/6830a6a.pdfIn PDF document text
    • https://jajoteraluwem.weebly.com/uploads/1/3/4/1/134108878/677195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_60171b3336777.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4424997/normal_60b0ca9438e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_606992decaec3.pdfIn PDF document text
    • https://wuxigato.weebly.com/uploads/1/3/2/6/132680835/0f7eb1558a.pdfIn PDF document text
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/kamufexunigavefedefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fc87a2da9a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_60192c043eb8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_6040d873ed194.pdfIn PDF document text
    • https://kogoporerosuf.weebly.com/uploads/1/3/5/3/135322240/wamiripupixixufudut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_605d522eca534.pdfIn PDF document text
    • https://rosolovok.weebly.com/uploads/1/3/4/6/134687291/86cd56e2a3b7.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/f335b2fb03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_606d2c1e8062d.pdfIn PDF document text
    • https://niduzipotobumam.weebly.com/uploads/1/3/6/0/136054567/11970.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/96422994-c49b-4708-98d2-ba63d614383f/51246535528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f15b73-c616-4c7a-a0b7-eddc0e3350a0/collins_gem_sas_survival_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7ef125-2ce1-4664-92e5-4db69b731794/cant_connect_to_internet_using_mobile_hotspot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be95594-804c-4c22-9d50-e7f0f1ef4e7d/best_vr_movies_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447d1763-4525-4f59-bf55-d7e1b2c80fa1/mapevisemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53567f7f-eea3-4df3-812d-6dd66da24e6c/kemilulevomodut.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_off0001250c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250C 5484 bytes
SHA-256: b39ed4d24d0a5bae1171a42a891a9615e786ec72363fad1a1658008f2961b63f
font_01_sfnt_off00013781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13781 14000 bytes
SHA-256: 52014372cda445ddeb764e50df676783a7bcf5d81fce15fb506999ff3d7f351a

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