Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0eb90eab4a4e242…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 00:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2518b00966c750cfbcc230543c7c20e8 SHA-1: 92ff8858b89442594aed1124bf68e6768add4623 SHA-256: b0eb90eab4a4e242b7e060d2cee4c990968c381972679da5d7b30776fb646ba4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The PDF structure and the presence of external links are consistent with spearphishing attachments used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=n0va+desktop+apk PDF link annotation
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/bitodawosonemovuguravabek.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-07-02-35-56-86.pdfIn PDF document text
    • http://pasaru.com/upload/files/99764274133.pdfIn PDF document text
    • https://ka-base.no/images_content/file/18233226261.pdfIn PDF document text
    • https://goodnest.info/tctt/sites/aaa/file/41509527451.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca81acaf4---bozujine.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630975570.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/94847524024.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/tajaser.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/nifilotelugebonosavaduxi.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/lafalorululofoginimosena.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/90049603218.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/58216613853.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/43634588770.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/lomawonefojinepimul.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/93396768307.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16311351721472409632.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109072106353808.pdfIn PDF document text
    • https://festacontinua.it/public/file/29242170725.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/46153173665.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/wupugezaniledapobatewuka.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/sidavufapisenologete.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/duwigivuga.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/79503152384.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 10300 bytes
SHA-256: b892f042a0443aca0b40de2827685c531e1bcd1ed51fda2cb440b5b03a0141f7
font_01_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 17812 bytes
SHA-256: 410a2121645d8402c0a2e4bc9fcc6bc8facbb6011515b56c30b40411506ef58a

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