Malicious PDF — malware analysis report

Static analysis result for SHA-256 9247c0b9015fc0a3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-12 02:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b71c1fdf303e54145b5101d4e1c9d8fa SHA-1: f0c53190c31b13c5234d1b47c14796c8716b5210 SHA-256: 9247c0b9015fc0a3f896e1285a88231e6d8109d8aa5ab9d9dc25b20627baf92e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised WordPress uploads and a payment redirection lure. The document body is obfuscated, but the presence of numerous URLs, many leading to PDF files on potentially compromised sites, strongly suggests a phishing or financial fraud attempt. The primary attack vector appears to be directing users to malicious links hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161365d30cf831---sizawiwaje.pdf In PDF document text
    • http://clingac.com/d/files/togulifelu.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/vedofejerudezafunegimago.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/kukupuxen.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/95097935329.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/wabitiponikajezog.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/23123506579.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/31083131290.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090421035173499.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/80361862229.pdfIn PDF document text
    • http://aweibel.com/Photo/file/9864901316.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/xujobakat.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99b400615---81826368264.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/punuleraw.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/sofina.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/77575363794.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329ea09a12f---zujulasomos.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb8c005149---salunezuvu.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/movaludixuluvepu.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/supepeni.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/luvagajavumavagexexixa.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631239210.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/sakepatitejagupe.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/degoxatujelujetuno.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/xubowosakufujeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=see+private+accountPDF 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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 17608 bytes
SHA-256: 496c4f297d608634233f573cd3d70b3a4eb7d227e3669516c570eb2039f9e3dc
font_01_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12956 10396 bytes
SHA-256: 6f5379a32307e8a386f66cf45e483de3e6f4fca0b0cb5c3253665de464a4cedb

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