Malicious PDF — malware analysis report

Static analysis result for SHA-256 97beaea30b37c6ed…

MALICIOUS

PDF

71.2 KB Created: 2021-09-04 04:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a317a11bd6c9a2e9c69b9ec779e5d02f SHA-1: c04db7ce4119763e6587ff071e55aff975cb32d9 SHA-256: 97beaea30b37c6ed39f98b38c8cafb34e322388b16188cf21a2049bdcf184713
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eeae550454---wonavo.pdf In PDF document text
    • http://asckhn.com/acskhn/userfiles/file/bavatalotulagirobumose.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/wavonobupon.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aee3577c45---dowesatogogebelixokofajur.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/lapuweraxovivimakiwun.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/22851560112.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/75054999695.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/7f94d571f268df80e8fe6e4328ea41c0.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/093ed44b40ce168d742247237a1ca7a5/38360113192.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607acdb9c6d5e---radujijitanelowiwe.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210618072136_2h2trw.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085edf5ed9b8---41866884179.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15584134a3---70558541770.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a3cfeb328c---joritipagemorezof.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/89688387115.pdfIn PDF document text
    • http://teifsepahan.com/files/file/76264578874.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/94358666797.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jufubupusixazi.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/6f628b6ec03fdabdce9c300adfa6c8d7/bivolazaro.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/29030806705.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/pajef.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccf258084---dubidewiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fiche+de+r%C3%A9vision+brevet+physique+chimie+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/32225604606.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_off0000b3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CB 15732 bytes
SHA-256: e452b4582284dc6f73a4fc4fdac8393bc64786dc65e9c4192be768feb8a1e80c
font_01_sfnt_off0000dadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 11376 bytes
SHA-256: a3e38b5a8d46a79e177f2ec5f6110c2afcff5a9cd20af752dea1bac9f3fcfcd3

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