Malicious PDF — malware analysis report

Static analysis result for SHA-256 267e34e222a657a5…

MALICIOUS

PDF

81.0 KB Created: 2021-09-02 08:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b2f0f73d490e8dbab7534fb5823ca75 SHA-1: 499858a376c291a6ec03007acb71d63752426ace SHA-256: 267e34e222a657a551f130cfef744775074f39cc7f4b5f48a02650da4698a677
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware distribution, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the PDF structure itself facilitates the attack.

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://crewmak.ru/uplcv?utm_term=meaning+of+production+planning+and+control PDF link annotation
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161237f721183b---takagasune.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/bigesuwipilekezevezari.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/zeredejosusupapawi.pdfIn PDF document text
    • https://dhesient.com/media/93904723663.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdc5e1410b9---41560571729.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078e259b9a21---90770090297.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/78457599511.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/d85r1j2smspnva8smfhe8ch328/56775100020.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/oc0il7ldtapuknkd97s0ast216/jimewibuwunakosudiveg.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610670a0ad9d3---13294334518.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf1ed55d8---jomimekem.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb368224ce2---62876947551.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/391231df4a85924be5214f06eb562af6/gusevug.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/tarekaxopidu.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/94657351096.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f09373c857---59373172946.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/59033933334.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/27648681925.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608187a4bacb8---99675125448.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/limemajebomidebogujekinok.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/sowuviwile.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/48261756110.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/tifonabalulosutu.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/15607227993.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 10720 bytes
SHA-256: a07cdc44157f4f7b1816eecc7cdbd0501fe151199f725fd0f6959f3f6b3df9c1
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 16940 bytes
SHA-256: a1b105b26b5b35315eb0e6ae709c4def18b51f485efb8c6a3bdb41ed27258654
font_02_sfnt_off00011ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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