Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40097e661ff8e4e…

MALICIOUS

PDF

72.3 KB Created: 2021-09-06 22:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f78ddcf021c3482b2f8aa44fbcc2e209 SHA-1: 27cba387795d3f8d235519f0882b8d7536884350 SHA-256: d40097e661ff8e4ebd454784ae993a61511f1b367a70b6b45582d9b643edc790
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://sgrappresentanze.eu/userfiles/files/supuwipavetave.pdf In PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16085d82861f22---zukoxit.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/66032581889.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/jazuxotutadarazota.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/ripafejowusa.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611ff13fb69e7---3728461853.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3859e5fe91071b02069ef1f82c2ed1d8/pekuxogexo.pdfIn PDF document text
    • http://orderkai.com/uploads/files/kezugaxanunos.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926bf188757---rigapeluzefunefefa.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8320b4d2d---64685118191.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609478fc18471---36461721505.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/46df6b68fda6dea8c8b0c05ed01f97bb/65104178427.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/35061694053.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210724180133.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/85372939968.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/ripemawogonizogumot.pdfIn PDF document text
    • http://khocabien.com/uploads/files/ralowub.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/76041935624.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/23904613022.pdfIn PDF document text
    • http://scro.ru/pic/file/xopinezubovawuzesuwuwixej.pdfIn PDF document text
    • https://clubon.top/uploads/files/pujewekil.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cb191c78b80---nubenojusijazaxoropusi.pdfIn PDF document text
    • https://macronew.com/upload/files/39016029406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=present+perfect+exercises+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_off0000ba9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9C 16228 bytes
SHA-256: b59615bf86c3ef0767d9e10d70e764727684e4f6ef1c597ce4a0c2cadddec7c5
font_01_sfnt_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10388 bytes
SHA-256: fc04982b5401004a403e04837b1e1d0f2429b6231d48a4063395f075c49f4a65

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