Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e21be28e8c6f35…

MALICIOUS

PDF

84.4 KB Created: 2021-09-09 22:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b378a241855d083be2a1df8c59d09f03 SHA-1: 30ac29354180be0da4e6f0325c7185665e597aa4 SHA-256: d4e21be28e8c6f357257879137ca7e1b1eca509a515407417bcf627f751e9467
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 0.9951

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 http://tingchucontrol.com/Uploadfiles/files/59963414120.pdf In PDF document text
    • https://alshaabcoop.com/userfiles/file/fevor.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/24300580214.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/loridugebubenivuze.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/87726837599.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/maxajir.pdfIn PDF document text
    • http://synhbio.com/upload/files/gusojivofinifigazo.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ee8f844f246260566557a321a995fcee/60843298920.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/zikopedidunafefo.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/42144317151.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613265f734ddd---wubugaxuxopujodigobuf.pdfIn PDF document text
    • http://steinemann-ag.ru/vojonosotemusaponaxagesod.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/fuzafurepaburunilabofe.pdfIn PDF document text
    • http://rld-carbon.com/file/vefetizujirased.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/39654854030.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///12956020424.pdfIn PDF document text
    • http://schokozentrale.de/idata/savaw.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/37457258235.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/23437801547.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/69139352423.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/60173068997.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/loraxutimugaloguzirun.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/69456986062.pdfIn PDF document text
    • http://blueyee.com/upload/file/01202703511.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/75672918416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=world+clock+android+phonePDF link annotation
    • 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_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 17620 bytes
SHA-256: 5ffa6e762ecc4a87516896bd5b52252cf5ea997caea97cf04dda864b6d1f0660
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 10428 bytes
SHA-256: 6ac003173bae42d6c81beb55fb98079687ba6066436de03ebf85fd2579cafc54

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