Malicious PDF — malware analysis report

Static analysis result for SHA-256 97232e145eb08017…

MALICIOUS

PDF

75.2 KB Created: 2021-09-21 01:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: facafc4336293002bb824de4b743bc8e SHA-1: b16c3c3a857aa05918d5e23aacbe67be8d855996 SHA-256: 97232e145eb08017cd8b2d3c7af68d1d0d0b368238bf1084f730cfbfef802ece
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO poisoning campaign. The embedded URLs are likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134796fae77c---20064091298.pdf In PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/4847447905.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/movebevelitoxepino.pdfIn PDF document text
    • https://agermag.ro/mm/file/69969969702.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/titibunal.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/magolomoweda.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/jakonidixuxizamadi.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/zufolor.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/boximivipomemivazum.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/13319637361.pdfIn PDF document text
    • https://digireg.es/upload/19617819401.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161449325e69e4---13423798583.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/69029001659.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/nuxegezonunekiz.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/2896659273.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/kemifikinolurebufe.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/70384081171.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/zorawodelusiladuvumopasad.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/zifusoladitagaxagor.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/99795321405.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/4a07b41e692a2b5dba3072b4ccd53513/71720477694.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/juonab48tqnbvc7lfnt46n564d/xuxilevexolifuvegunebejun.pdfIn PDF document text
    • https://ghnservizi.com/file/34219381192.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/12292769987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=carx+drift+racing+2+car+listPDF 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_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 16908 bytes
SHA-256: 5eb41bd10a5cee70104e17d9c6e04e8805fb82e4b0382c9b79a004e3b3cdca37
font_01_sfnt_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001075f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 10652 bytes
SHA-256: e7ed2e7c60d5808715bd0f35fe322288d9aafe59b236112747907cd0a2c98515