Malicious PDF — malware analysis report

Static analysis result for SHA-256 32962b72c92c7305…

MALICIOUS

PDF

137.9 KB Created: 2021-08-26 18:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef615b513d4b85a1dca2d8ad8b6faca6 SHA-1: 8243d9989a3afc6791790337af4ecd08ef8ec81a SHA-256: 32962b72c92c7305124f9303b123607f50111861ac0eacc69a2198b6f4db29d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised WordPress sites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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 https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89f8cf0e46b993530cf9726497020350/raxikemanifibofibil.pdf In PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mumu7r56e8igv6a0uja7hetkj2/jamewilapala.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b46983fed0021cf02c5c944b8b0711de/48220962251.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c88424916---zijimazunuzobifefudukop.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/doxitikine.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/78525768629.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119bc44f21ba---43462566849.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/93164783763.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/88621893719.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/22161106023.pdfIn PDF document text
    • http://amandamaitland.com/images/file/79824031572.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/7cf758b3964511e0e3c4ca7bca87cc84/pisupamamasurutarul.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/bubata.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc535064e7---wutonezowufodobuxarepodu.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/3991725967.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/65591413000.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0e90bf585---98640830541.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/dd2ec216452851b1107683a37d142a5f/29679785258.pdfIn PDF document text
    • http://fotossc.pl/_files/file/tifubiwemimix.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1629249017bivasinikezelagegub.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/gefitokujalenojivo.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021581827228694.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afa283e54da---70889645210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=i+will+love+you+lord+with+all+my+heartPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001982d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1982D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B03F 21128 bytes
SHA-256: 5018af97062888997ccb94214c07c17818f1ff5bc96bcabedbb9c81abd76a4ed
font_02_sfnt_off0001e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5A8 10556 bytes
SHA-256: aa343fbdd3dc5edde1662ad50fb5ae02ed5a51a3f0e578064a6651f919c49355
font_03_sfnt_off0001fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDC2 17792 bytes
SHA-256: 914d99c893e565be52d2c7ab87fa8e492cbafa109e967703a576a44c5d7664cd

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