Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca074aa083f7a04…

MALICIOUS

PDF

84.3 KB Created: 2021-08-29 23:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e94e0ea383635cbcd03fe30f926f8e9f SHA-1: 15746a793179dcf7b902a3119cd5dc1078fdb418 SHA-256: 9ca074aa083f7a04383ced8a0143b671fa7c97f91658768816e9bc877dc4489e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on disposable or potentially compromised CMS platforms. The primary goal appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c7a5f2bff70a42c98b4c74ca9e4bc6a0/95518834361.pdf In PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3848ae629---25801676410.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/24807546262.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/83669985145.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/4b9b37eba526729b301dce4d4b8ec2db/kaxorafamiwezoriten.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/jefetimanuziniriwama.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083a34e2871c---69636981295.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/93666311221.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d67499c9e---gikuzuxuxis.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/pubadesenojukamejipege.pdfIn PDF document text
    • https://kopari.hu/files/file/nogebaposab.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b744fac230b---6208802581.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/gunaretat.pdfIn PDF document text
    • http://elitvorota.ru/f/file/85244785767.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/xanunojaxu.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/7146038225.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/wolarefaza.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f68887e9d2---86276258170.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/22249429989.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/fewitukarisufeni.pdfIn PDF document text
    • http://immopolignano.lu/images/71838828641.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/gamote.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/sojadojisekiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=not+withholding+federal+taxesPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/zabilojuw.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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 18536 bytes
SHA-256: 648b3cc864c37f985d5d78546d49c7f67b5e9ae259579e9ed7688584949f9c31
font_01_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0C 10800 bytes
SHA-256: a676d4e7c42914eafd0585534b11fd399436d381d603565ee5256b9b76f12a37

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