Malicious PDF — malware analysis report

Static analysis result for SHA-256 0972bb52f80f995f…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 12:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 184b6d809189e96dbabdfcf7b99d3dc6 SHA-1: d923de8a4e741d551fb784127a00651cae6435fc SHA-256: 0972bb52f80f995fd344f07cebfe26d35be3a84fce2e8e9be9c68ebdb7eb4165
176 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect the user to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1a771a4930f728be2b9c671377fccda9/44882776207.pdf In PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/pipeku.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/047ac6b967779229706c6aee5f91bc77/66214144181.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622286387.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/92815385816.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c781cdf4f6679b137c6cea4d1220533d/bobotokodin.pdfIn PDF document text
    • http://furniture83.com/upload/files/diminerujeg.pdfIn PDF document text
    • http://kingnature.ru/files/files/sologamesomutevelo.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d188d878657---durimib.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082d992a2a0f---92818844738.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/23347955754.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/b07a59827430492a63c8e458410edf05/72939922742.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/57537028593.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/490365f645a95a0891f7626c8e6d1e6f/52792179211.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af990b3914---3416427100.pdfPDF link annotation
    • http://ahxxzx.com/userfiles/202105/file/dudurizavi.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/fuluzumomulizopifinu.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/61551600168.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/wetamegewile.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/vujudejozugizefotizexuji.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/jeduvovunufogafijad.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a21793e87---wimuvunukamu.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/goseseziwimotuku.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/viwitikukiwafijevoxe.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8c3d60ccf90e797ce3181ab9514bb6b7/morababebatolakatatofeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=definition+of+homeostasis+biologyPDF 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_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 15972 bytes
SHA-256: 3d183234b92ecbd28dde2cfb4444354f1058dad44957f288fc6c199834e6397e
font_02_sfnt_off00012f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F86 10816 bytes
SHA-256: c815472e79e9861ee9b827fec5f28c079c276126018852582df44bfb85e18336

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