Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c18be88d9c2773…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 01:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17b872f38c5e45d86c3b0e2aa09608b6 SHA-1: bdfc44a1f5ac6bd3e205aafc47ad5012a6f3b91e SHA-256: 59c18be88d9c2773476e779b8d77fb97837e4bea86cab322aeaeae693ecda6e5
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to lure users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://mrhobbscoffee.com/images/uploads/file/42764690182.pdf In PDF document text
    • http://sino-web.net/filespath/files/20210909051751.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/15841782137.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/sijatefeturiz.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/mugivuvikuwele.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/032306157626.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/kusupudelupotitavimuxa.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/ninutozisil.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/tapepezomikebawe.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kanadof.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/pamufegabodovo.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/mimazobatazijolusodid.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/18859184294.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/rorax.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/671aa0e1a809618587652fb5c7a010e3.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137aab336e91---sajebuxiliropusiw.pdfIn PDF document text
    • http://terrietanaka.com/library/files/93808227930.pdfIn PDF document text
    • http://termocity.by/pics/files/93475665395.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/77009860634.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/78998398963.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/sawebuvoluzesegig.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/18405756780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mini+militia+god+mod+apk+latest+versionPDF 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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 10888 bytes
SHA-256: ea6eb4b8b365ec7615bc0b827ed6386a5ee36fd9983cb6f4beaf4b3fe076b107
font_02_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 18040 bytes
SHA-256: 323d75f4fdd0a23623a9e69703261b861057a3152022e07a7e7e62380cbc6def

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