Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc512c3f67876d23…

MALICIOUS

PDF

102.1 KB Created: 2021-03-24 02:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d88f6fa4272d4e8480453265ee6c28f2 SHA-1: c9be4ef72d96d16e809112e00b3c3d5c2f7429cd SHA-256: bc512c3f67876d239db326ca4098f6884e8ca016ef51781eb5c0e23c0054a337
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 0.9995

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://bologen.ru/wix?keyword=skyrim+thieves+guild+quests+killing PDF link annotation
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/4302910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366313/normal_5fcd39a12f1b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_602075748b331.pdfIn PDF document text
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/4105530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427268/normal_5fcb0d8743aa1.pdfIn PDF document text
    • http://vulifux.66ghz.com/answer_to_the_impossible_quiz_question_56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413004/normal_5ff85350225f1.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/runipera-xisitipoma-mubel-sojak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_604493393373e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_605a763778f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_6025a97bbd994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_600aa1d9e5699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_5fda32814658f.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/3d192e41-89e2-4b92-9f65-42a0428a1239/como_hacer_ecuaciones_de_segundo_grado_en_la_calculadora.pdfIn PDF document text
    • http://wubijati.epizy.com/el_principe_maquiavelo_paginas.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_12ca974ba959474fa46d71c8707fd26a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5deee41-00bd-4656-9628-3ed791e7aaaa/jvc_kd-r540_how_to_use_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d7fbcc-f7f1-44bd-b000-a7e5d12de6e9/82811718008.pdfIn PDF document text
    • https://2df7536a-ab64-4dd3-a6ca-98e0eca144a4.filesusr.com/ugd/de578f_53ce6f26778f475f9547515f89df39ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34955f2-d56b-4b88-ae36-eb876e628d66/lovobo.pdfIn PDF document text
    • https://56352102-112a-4456-a677-0775450c4ed3.filesusr.com/ugd/ed4e87_d5f23be231824d1598be3fc47d4f10ea.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434D 3312 bytes
SHA-256: ac66ddecb1889e99694234647e4a1e19b6174440e696c9ee44c6cb9711419273
font_01_sfnt_off00014f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2E 5484 bytes
SHA-256: 09fc5f5bd782bb3dc9e90549ee8d98739dc1b03f4e388d6b754c6ec5d4750ca5
font_02_sfnt_off000161ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AE 12528 bytes
SHA-256: bd9de770bd318ab7c33ed2454e4dc606dc3fc48e868f0113f3af080bc1bb491a

Open this report in the interactive analyzer, or submit your own file for analysis.