Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafedb12c93bdd32…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 21:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bd8999f4fa6731ec8ce19bca8197a826 SHA-1: dbae71ab1802c1a5f5d778a25ea7f25897627542 SHA-256: bafedb12c93bdd322c4c088e7577fa673b60c38e6cde7a9d5f4f7a89a0cfbb83
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm or SEO spam operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=slitherio+google+sites PDF link annotation
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/bojukaxij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5fc7469f0379f.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/b1468d584b2040a.pdfIn PDF document text
    • https://pirulilepeno.weebly.com/uploads/1/3/4/0/134040853/5219297.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/aa_kinsey_report_2019.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/21564537321.pdfIn PDF document text
    • https://sujutirox.weebly.com/uploads/1/3/4/5/134595549/dojazafonovul.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/raradisisegu.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/numan_badibexadif_xaramugewozu.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/4942915.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/7fbf843fd78.pdfIn PDF document text
    • https://xidoteruredogon.weebly.com/uploads/1/3/1/4/131454367/xedadoxa.pdfIn PDF document text
    • https://vinaribibivo.weebly.com/uploads/1/3/1/8/131871854/godaponu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketabigumowun.atwebpages.com/petotoruzakus.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/nesulokanarik.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/adobe_acrobat_reader_dc_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/tolerance_essay_by_em_forster_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/chrome_os_latest_version_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/how_to_implement_guided_reading_groups.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_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 4840 bytes
SHA-256: 7ac93453c8a2cfa14fcb6148fb66ee92aa612d6b074bf61e91ffa85f5808c376
font_01_sfnt_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 9968 bytes
SHA-256: a071a675363542f4af7306554b006609732492d71386ac377484fe179643d320

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