Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8425cebad62986…

MALICIOUS

PDF

74.8 KB Created: 2021-05-23 09:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 08337c855f3cf7df105284aa1601e17c SHA-1: 2fde6248188ea851ecc8e47bad75f93efd459a6d SHA-256: 7e8425cebad62986f80004396f4064ea879fa6dbc56144938c3161a38adbc245
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://botokaw.ru/strik?utm_term=what+causes+squeaking+dryer PDF link annotation
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/zusolel_kerezipifunufe_pisodajijipom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_60317fad8cf98.pdfIn PDF document text
    • https://gobufitiribe.weebly.com/uploads/1/3/5/3/135321776/3259686.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/jurimigorojina.pdfIn PDF document text
    • https://zupikadi.weebly.com/uploads/1/3/4/6/134667234/521753f9e604.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/1839665.pdfIn PDF document text
    • https://fujifarilopo.weebly.com/uploads/1/3/4/4/134483008/7947760.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/336524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454299/normal_5fd91f47a7665.pdfIn PDF document text
    • https://tajezutudod.weebly.com/uploads/1/3/1/3/131398094/774fffcabb01.pdfIn PDF document text
    • https://mexupapomumag.weebly.com/uploads/1/3/0/7/130775103/d30d7f.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/zutadowiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_603f528c28236.pdfIn PDF document text
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/8132525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_60168b3873032.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/mipawevar_xoxedafudus_sedabulazuro.pdfIn PDF document text
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/aab67cf2.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/9fdbc085-ebd2-4b9c-813b-5ca12c6234cb/72545084825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedf3d17-3ab9-4123-92c7-60994d018ab8/what_is_agile_software_development_framework_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1415e4d0-d785-438c-ab81-044eef599246/processing_time_for_190_visa_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8185ebaa-3390-4dc6-9215-0553d0dedaf9/9568386652.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_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5476 bytes
SHA-256: 01867db05f02f3202f720d8a1eefd972aa5b11ff777e2c8d7fafd0897bebf9f0
font_01_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 10736 bytes
SHA-256: 7745d1fc0cbf6dbe78974d08e6242cc9b658f9bdd52bed569ce231d0c5c1f79b

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