Malicious PDF — malware analysis report

Static analysis result for SHA-256 305c30c9fbb15da5…

MALICIOUS

PDF

85.9 KB Created: 2021-07-15 09:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fc63859dbf2a4bd45fcf2455ce066a2f SHA-1: b039cbe98005769bada55e2e56d1e623e4944a50 SHA-256: 305c30c9fbb15da5b68060fc5312dd4676de5f5a914eda2ecbb61f903808bbc2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b866931273---pisupexuze.pdf, are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b866931273---pisupexuze.pdf In PDF document text
    • http://mofrantech.com/userfiles/file/lefisavomagevezejosomovar.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/95690246316.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc7854e365---rulilujulewilijit.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c1c4fe631d8e3ff707dfa3dc0f068423/zisixesurinal.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/vogason.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4adc880ffe8054b66da78f368560bbc8/rojunobabetin.pdfIn PDF document text
    • http://minhanh.com/files/xevukifiwive.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/vozabe.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/memoguvunepilukunutasi.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/29742036196.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/820a374858bf7480ce4efdfcbcf71454/79751143640.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5684bf5ee---96889544812.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099b23848326---satewo.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092633d04740---70858632405.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/ruxisudo.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/12ffae41025ec6a9f4eacb6c52a4ec37/7470807175.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fdd64694---tufunazej.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd42d66ccf---xadaxa.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e05bdaad9c---wotepob.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/rejepiferevoga.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094641db5188---mexopolefekelawolatesizi.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/abbd58eab64958b7619ee8eed2517f95/niperuxusifal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=lady+and+dog+sexyPDF 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_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 17600 bytes
SHA-256: cc3e408f42815c32a23c56e77b150ff90ee6c9cbde4693c86400bf9007a33a88
font_02_sfnt_off000133ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AC 10260 bytes
SHA-256: d11be1beee0e47e093ef8094458ad1e2019071ea877d442c72dace386840a600

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