Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e715b3e9ba8bfc3…

MALICIOUS

PDF

80.2 KB Created: 2021-08-27 19:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9b48cec1abcae390dc6a8068c08f0fb7 SHA-1: 1db3926a6b4d66566c61fe41879a8e3a9302b9ab SHA-256: 3e715b3e9ba8bfc315b93964688e29501298f2ea4bd6cc4771c5d745c177460b
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users to these compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pistant.ru/uplcv?utm_term=difference+between+compound+and+homogeneous+mixture PDF link annotation
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160944f7d023ce---87352579192.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7cdf26aad---38477211202.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/18158300618.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/89489026725.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/pafogagusawolol.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/jezorikedipuwokukab.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/lenaxuvosisurelulop.pdfIn PDF document text
    • https://hgb.se/filer/file/47978502021.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/fenujigivoxunor.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/kanufupofitixifalepen.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/memofupovazujixomofesumaj.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/xarolu.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad929c942bb---lovefubonitujof.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/71953745463.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16105d2bde4c55---42342988132.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e4d334f8---20403126189.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/76023571350.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/lemugoxovebofifupiput.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gpjo4qctge1jdgfrh3b69go4fo/124270138.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/fowewiwivepi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607270a3d10bb---tuxowerivuseboj.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 17220 bytes
SHA-256: fc5f2a69e2e3c90aa260b7e88b6db1d6255571b7485a3e231ff20c495ddf5762
font_02_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 11452 bytes
SHA-256: 576c0e3b15f91be523f457300309317026aa008623bb025bf377f8e332cdc865

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