Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c03c0924bdb021…

MALICIOUS

PDF

89.4 KB Created: 2021-07-02 02:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 114c65f2be964089a5194f22f7f4d79a SHA-1: 8d10a234075acae4822d6fea175e4c0c4cd3b206 SHA-256: 02c03c0924bdb02131c94d985327a4c2c500b2f0581a618db28575768f7e519b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://nationshield.ae/userfiles/files/barasozoberebegizulupu.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d3b99460a---59099254687.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/5e8b3e1c29fbc8bcd0938790da6a1734/9445331988.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/9k53vmacfroidcgae9n5fvcmu3/86832149390.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/d5qlpn8jcaooaua1v36qoim6ts/medukefapudiwazonidofigug.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/75870c551627e4e19072eaa183bbd33d/zonilanobelewurelobo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb234b470e---lojonipekovax.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/rimoze.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f627a937b---jatamimal.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de14eee0328---tojusoride.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/9a7a5d09b70b2f84d5a94120126c4481/dukivadu.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/fivupe.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/16676511934.pdfIn PDF document text
    • https://actorconseil.com/files/file/81156463632.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6c42f0ff4---zonumenolenusolupedofife.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/54560917766.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/12752651788.pdfIn PDF document text
    • https://chp-travel.ir/data/file/26931278473.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2103c9a9b6---pakika.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/mekufojazid.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b08f1569f---xometi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607453eda66d9---39979953367.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/soroboj.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/18961687098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=assisted+one+arm+pull+upPDF 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_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 10636 bytes
SHA-256: 490f99bf158b61621167e37eb028e41d05c2ff102904bc5e71a5f44a9879288c
font_01_sfnt_off0001119d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119D 17264 bytes
SHA-256: 0f8a41df8af2795797aa73493027e121d282a356707abd6b359658de4480a4d6
font_02_sfnt_off00013eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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