Malicious PDF — malware analysis report

Static analysis result for SHA-256 563582868bf2426b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-13 06:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7bc24aeb3147df44735f12e0bc96741b SHA-1: 9815c52330ca6c69e5d9074673f99b64ee82d3d8 SHA-256: 563582868bf2426b9ab70e50ae5ae6c0236296daf2ee4f19c1e6ca9511350292
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://itps-group.com/uploadfiles/file/dajarezibulefepowuladudip.pdf In PDF document text
    • https://latrinquette.com/upload/editor/file/96649094093.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/gemepibipijavaxufe.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/80737461507.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/modokapuzekaxurokagu.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/59457427523.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/kixuwafovozamaluzugev.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/kubazozezomebulofawa.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/29793797392.pdfIn PDF document text
    • http://juha.be/_files/file/fivususo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca8a1b0159---kaduwofijagagoz.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/19292492221.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff07f2e75c---gumasipazupajinuwabuw.pdfIn PDF document text
    • http://nature-revive.org/files/file/redawativogikifawevozepu.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/demisugime.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/zezunatidupi.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/47225380905.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/wufirebudapufuxo.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/gopanokaverexewem.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/gebefa.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/37906871239.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/17050292128.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/razis.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c1982a9d9---saroka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=addicting+android+gamesPDF 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_off0000e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 10648 bytes
SHA-256: 8029a8860d3394fbbf2461b181b911627b366ce057d71f4ca873ae137e7bef9c
font_02_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 17472 bytes
SHA-256: 86264692b1c69563e40cc04919bb7bbc48f962d67a68308b698a87abe20bd59b

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