Malicious PDF — malware analysis report

Static analysis result for SHA-256 333cb3e29f3e04c5…

MALICIOUS

PDF

80.7 KB Created: 2021-08-08 23:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8b29a239345fd4a5d52af82e7e182c8b SHA-1: 62e60cbfd9f8541c4ca87403291a9584f031bb48 SHA-256: 333cb3e29f3e04c5f0dbe6cc57835ae70519d30e55133d8744c08bd5e4884078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The presence of these links and the overall detection score strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7908

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://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/mheu4egumbnbgg3pl6ohh3uu4r/jerixegewikagudelig.pdf In PDF document text
    • https://burstallconrad.com/editor_files/file/nomude.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/38153550358.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e41f8e92f0---xidawezopokipilaxobol.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/57192703142.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5hsgb4q8ijk23urfgdp6v96r6j/3321857913.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/047b2146cdba2015e729d7eecacada56/14914939017.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/kapalujinomujune.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d1f7d14e6bcfe1f24ea2530085ee68d1/25286948495.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/74933688715.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-26/images/files/16501362136.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8cfb93163a980557b4d638d7c1754909/34240743017.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/3663520314.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc820e08c1---95142395808.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160840c89819c3---filamakawuvetawosidew.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09e5b40757---mekez.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080082e6fc9d---jevuziw.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/zeretesakezuxeb.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gvr3bkjh4e0r36c57l5h21ki60/87346281093.pdfIn PDF document text
    • http://americusfelderfamily.com/clients/0/0c/0c5e5e27a4da9db51eb23c24aa0fa274/File/gusagutogufumefefanotova.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104300210396936.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210614_E31057A5B1D4A4C8.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/96456620574.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/teluwawuxalipot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+do+you+set+the+date+on+a+timex+ironman+watchPDF link annotation
    • 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_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 10980 bytes
SHA-256: 39935d112860160ed6a2f67dee40995c111b1e88b1c6e92adb6e531f5171e9fb
font_01_sfnt_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 17260 bytes
SHA-256: 0b2bcee8e94daa6f11a5306dd32c2634ffb79073676038423c2ef45108a49346
font_02_sfnt_off00012336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12336 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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