Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ade020b1063f19f…

MALICIOUS

PDF

74.3 KB Created: 2021-09-09 12:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f972dfeeacb126b24865e43ea23d85da SHA-1: ffc4fd125a112c532fc85f080068357f9db05af2 SHA-256: 4ade020b1063f19fc7a0717585541cec613ad5427379e332966fe1747687d3c9
126 Risk Score

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 0.9908

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://allytemp.ru/uplcv?utm_term=spider+man+2004+123movies PDF link annotation
    • https://lmcmanager.com/ckfinder/userfiles/files/19215599403.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/nesozebazejefivofa.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/wajubewelolim.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/28042498575.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/5250342848.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/53318560473.pdfIn PDF document text
    • https://0900107678.com/upload/file/30031092427.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/93321951047.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/dikas.pdfIn PDF document text
    • https://bak.vn/upload/files/zuwajalurojibapipibezu.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/jozijizozuxi.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/77330251249.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134dd2f3d9ac---29237556604.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/45298820076.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/67005955519.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/nominematiperavujido.pdfIn PDF document text
    • http://vswet.ru/f/nisiwogiberagejudalatub.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/rapefapinibunuzijigasu.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/74178099308.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/vinetanidogidixorotele.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d1fd5266---jivomut.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/vuxidezaxalasepavofinuwav.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/90679968158.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/32776907851.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/35705986025.pdfIn PDF document text
    • http://minhanh.com/files/10867958335.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_off0000bf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 16516 bytes
SHA-256: 047c96148b5252a48f2dd869331fba708a8321da5f3abb466023354dd278658d
font_02_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 11092 bytes
SHA-256: 6342d16e41d18829ac8033ef0b4c8ba36831af6efe690059b41dee19b2dda0b7