Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba4bd5088b08a8b…

MALICIOUS

PDF

73.3 KB Created: 2021-09-05 12:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0ef3915f189993f5d8ea1ff832180b0 SHA-1: d34cadedecd4f74417c95868158bde1a05090252 SHA-256: 0ba4bd5088b08a8b27e9f942eb6e2469cd6e3ee248f6c9c8b667b1878774efc6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS upload directories. These links likely lead to further malicious content or phishing sites, aiming to trick users into downloading additional malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/8cqpd0nvqtvfuc3m01c3tapc69/penazuvipuvapuranibapo.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/745c57e228d8898f0917c41f9e285719/tizur.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/9a65d2a252c63c73ac83514dd81e2879/56876366787.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/nodapadanipewusage.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109cd75d7308---pakowupelerixevegabuvew.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/0dfdd071571d93a786303541447e0d11/puvejufas.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/75120242718.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/sirovivofomuwolavap.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/rilewanale.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/047f58d0eaca95946ee4b921e67322d3/37342942792.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/11191241148.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/bivuxuten.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/61941547278.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/reziwujukiseloned.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/xutejatufabavuvezeb.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/dokogosewemufozo.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210831_020447.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/xagujazelijotodipos.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/sekapogizugimuzojoful.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0c3394381---83043661814.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d5d36c472ad0b704ba6de210fdfc40ad/87644031549.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/84118902344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=engineering+toolbox+book+pdfPDF link annotation
    • https://lapdonline.org/file/detefizesusijekumaparepu.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_off0000bcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF4 16600 bytes
SHA-256: 7c080e847a58d8369b55740895c3f376c4a541955b87668830334b30d3c5a25c
font_01_sfnt_off0000e75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75E 10660 bytes
SHA-256: 39432cd9417fae96d72d1e4019bf2b48378ce8cf97370760c31332e4ead707a2
font_02_sfnt_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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