Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bb17fdb872b8fe…

MALICIOUS

PDF

78.8 KB Created: 2021-09-23 05:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 275239e186124376e5d8033e006e6af2 SHA-1: 51699d6a6b21c6333330f05841802d3b9227420b SHA-256: 58bb17fdb872b8fe4f30788a91137e32786e54d2177d5b6457a20a7e076ff0d8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites that appear to be part of a link farm or hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://youngdongtec.com/userfiles/file/25162318668.pdf In PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/pifesadixofokijiror.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/87947394598.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/78548081487.pdfIn PDF document text
    • https://service-panev.com/userfiles/40854457869.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/32896756750.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/burenurowoli.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/visumolunupuxumovatoti.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f456c68db3---budoditegoxuniwemesulos.pdfIn PDF document text
    • http://nut-shell.net/upload/files/pekidokajudavaxabekewam.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/dumefirujumupakija.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/vogajixufobepibofozozepib.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/zogaxutox.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/51741891575.pdfIn PDF document text
    • http://vln.nl/files/file/revojovogo.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/poxebu.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/25957077008.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/19399775444.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/vemogupipuj.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/18800970605.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/87e501c48cce24ea33529cee860d412a/zoravafutifi.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161488a974c6d8---45538765555.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/3381953605.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/37168794353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+pdf+drive+for+pcPDF 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_off0000d097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 17692 bytes
SHA-256: 6e4b2878c4fc7c2cdf03f9ef067e53c694ea624bf08733e137c0153fc4838c3d
font_02_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 10500 bytes
SHA-256: 7dbc3ebd88f81f98026c888ceacf50d3fcde806ddea0e5a3cf368a40c4fcc370

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