Malicious PDF — malware analysis report

Static analysis result for SHA-256 3399c30305b85fd5…

MALICIOUS

PDF

69.6 KB Created: 2021-09-28 21:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 79047e3a53f1e99fdd5e8e4ae6f81c28 SHA-1: d4acb27f782253fafdb0d05fc6e9eb0f2110857a SHA-256: 3399c30305b85fd55a2d4452223306487e0881d57237c67467fd4242ad3702de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs pointing to various domains, coupled with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, suggests a phishing or malware distribution campaign. The document body is unreadable, but the heuristics and URLs strongly indicate a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://sbs-group.co/userfiles/files/38994827280.pdf In PDF document text
    • https://okul.gencreklamajansi.com/uploads/files/vovibawafofosufimemado.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/dovedabinokasulefoz.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/33275519028.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/wafotuditefepalenetarabad.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/32857313525.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/zemeferofururuvepotana.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/14678185878.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/47220628159.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/3618953555.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/74404405833.pdfIn PDF document text
    • http://dkind.net/userData/board/file/wised.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/lezata.pdfIn PDF document text
    • http://cnfgl.netsociality.com/upload/files/63075420370.pdfIn PDF document text
    • http://it-hair.com/userfiles/bojudawupe.pdfIn PDF document text
    • http://landpas.pl/upload/file/midofarid.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/51482490707.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/98047547304.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/razati.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/48421343977.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416fdef34a7---waloguxurov.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/xudavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cast+app+for+android+tvPDF 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_off0000ae39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE39 17080 bytes
SHA-256: 7f9dcf648b4834ee5e98d78e90ebdfa39b5c751d294719c2e7c9241c8157b8ba
font_01_sfnt_off0000d99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 10412 bytes
SHA-256: 1e9fce22ef0648a08bde05ad700fc507c495116d6e42a1d9e52c215f89d3ee4f

Open this report in the interactive analyzer, or submit your own file for analysis.