Malicious PDF — malware analysis report

Static analysis result for SHA-256 1237dc51140a2f2b…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 23:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 967530068a0307ade74656d83b22702b SHA-1: 5f53f4c561f274b78ead1b84da88eaf6f564f1a1 SHA-256: 1237dc51140a2f2bb31a6273182dc7b23d034f3976b63473b060ee1b8d083a1e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple disposable hosting sites, likely intended to host further malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://supermarketdv.ru/files/file/xavosunedamuboretasonu.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16114e03780415---gamikewepomirikobopexufi.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/jebegofivevejopo.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/xumilinudiguzarekabev.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26a172fe2d---49599252126.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fb886dcd---vejufimavuka.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/86246684013.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608681c66831e---zegafope.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8e224f93d---44587386823.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/43053245561.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/37339216182.pdfIn PDF document text
    • https://room12shio4.com/contents//files/wunovorozudekemaloxilat.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/31811554375.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/mikasopujosemado.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/netewosabasupilep.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/wajinozalazixitegem.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/jcnduig1nbs11q43aae6jtn5f5/8826303925.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/pusenusixawezu.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c21bg6esib07gdbqq0208cp3jq/51786073762.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/53983a0ad63f7efdd02803dad94651ee/damefumumiwawinotewusopu.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/dovudabusolez.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/26301133874.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/bixisuretarinazuzufebogip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=urology+surgical+procedures+pdfPDF 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_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 16924 bytes
SHA-256: 7a6a311bfb7591b190b9ec9d9fd8eb083fb0d4699ceb26caeb1d0c5de1e064f3
font_01_sfnt_off000104b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 10812 bytes
SHA-256: bda7895458ae687d68486c94aa4b9e8cb7b1534c43fe2cf3e73656e9c037b8e5
font_02_sfnt_off00011d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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