Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a3e6520331197a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-09 14:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8a93f4d5de8e8616a39b9384e1d62b5d SHA-1: ab03e33c5b7041095cd7c7a2bc2b46e732e7c33e SHA-256: 02a3e6520331197a3ca49a660f1b5139e4915caceb134e45e2cd12727dc39ff1
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 0.9977

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=filmorago+mod+apk+latest+version+download PDF link annotation
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/mlj9lja48l678844h34hvrh4hi/rubovunurapileb.pdfIn PDF document text
    • https://j26clean.com/upload/files/96065730781.pdfIn PDF document text
    • https://menu2uplus.com/images/file/56243762461.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/6743225721.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/zuridukifufuriv.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/rolarolesogegerexefepenub.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/tutixiwunuwud.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/zivosumajax.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/80718783854.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/10347707899.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/lemomadupop.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161344cb30b2f0---kopubigigojokefizenip.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/31340881704.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109030002467355.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210909_909DE3B8102C837C.pdfIn PDF document text
    • http://xtra360.net/campannas/file/15511563859.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210908195135962.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16305844621970637385.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/jefewodisomewujinujavavud.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/34606483523.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/godarimupuwubukemewumap.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/51485861093.pdfIn PDF document text
    • http://maksimetall.ru/files/98100492085.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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 10956 bytes
SHA-256: cc360f8739be4ec5474bc4ba9d253df53fd59e41b53907da955b1493c6ac5994
font_02_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 17648 bytes
SHA-256: 6f5132456958e2aaae31eb51b2acf6beff75ddb2bbf69f28027f36e410a01775

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