Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe09ef241b194558…

MALICIOUS

PDF

89.6 KB Created: 2021-07-10 13:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: be75bdf378299ebf5a994d33745daa6b SHA-1: f8ab8cb2c0eaedb05ab59a7f77704000c75176c6 SHA-256: fe09ef241b194558c582beb4ff6f54cb3a8c3c1fcf7871b4726ad21812ced79a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress sites. These sites host PDF files, suggesting a phishing or malware distribution campaign. The presence of numerous links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b81b5dcda32---kowebozepidoseroduzal.pdf In PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa872c63f---maxizinapekexo.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/83702870741.pdfIn PDF document text
    • http://juha.be/_files/file/tukizajufajubigidupeku.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bc9d3c28---sexexaligulakabiteda.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/825c5dcb380f169a40b1116ba863e94d/ziromufufedafen.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/lixalorekomar.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/56c2762a1a700ccc3da6c97fbd5a5c23/zarogugipusoxusip.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba15fe35b84---bezatevemerotujav.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b4ba00c9fc93cc4c291e0ffbec234629/85288351127.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/vagodiniredewu.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/74512206963.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088821ed0733---7148197303.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/9f6f6b674189aac132f4613de2f0c153/wukupolololosezojoj.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e325d02d9---tawipe.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e105c5bbeb8---51325273508.pdfIn PDF document text
    • https://maility.pl_adresuserfiles/file/56698193764.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/fq6glm9pia7fvis406ml8homp2/rumafevigifozebos.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/kivozuz.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/14016089952.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/35676501135.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160772384b9857---kegomototisazeloxo.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/5618025684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=narcissistic+avoidant+relationshipPDF 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_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AC 17144 bytes
SHA-256: e7b877148c27047d946c97adc26d243c38e46d281213eb9dcdc669dda6bc31eb
font_02_sfnt_off000140b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B3 10652 bytes
SHA-256: f32c2b0a2335e51d4e08851b0ae89ac5cb625d423d5192ca7fadea09c65abc5e

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