Malicious PDF — malware analysis report

Static analysis result for SHA-256 121dd334002dcd13…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 00:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0e61f452d909a20783283073925daf57 SHA-1: 266dcb85fc3cc3c0fabf3e3379432f8fbc980333 SHA-256: 121dd334002dcd131a1aee9ce509d7b4ac2ad1a2544a8921e5dabf709751f3c0
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely phishing or malware distribution attempt.

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://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aa83dd27cb0---41657038349.pdf In PDF document text
    • http://axiomestates.com/userfiles/file/resefevituxifawuzebugebej.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/dunutew.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/m36048nach2pv7ehvosnqrcu10/94261808310.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ab8323ee---tekonozudob.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ecdd54b9e799c7cb67af5bc430f45448/14168461741.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/55963460292.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/6cvso03kdi33llpb8qm71upi92/punodifemixitodowam.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/m100dh3q37v7ebj9s1fd5ljcle/gasalukitugabuwojiwix.pdfIn PDF document text
    • https://htchninc.com/d/files/73538468094.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/52648618717.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f120188b76---95017130977.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/bawuwupiboxabiwotetefop.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160790be2c1979---88899876618.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/tidosuzavelavinawegida.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9cqel2gm2lr0v3im8v06p8ga45/26339883932.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160941e5e27ccc---28399046386.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/24176553004.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8db1f03dceabaaacf7248980ac227ff8/vutokixaxepovev.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2dc6369bdf607725f22861ea1330a1df/8840875260.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b378c7ac88---nojipedejijuzulexo.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1a9ae8bfc78e09d6e9aa27259a757f81/xuviridonokazefopakujamip.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/75662801721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=electrolux+case+study+answersPDF 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_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 10656 bytes
SHA-256: b7d819aea555e7859f466c043157bf0f792fe4c73fc84d8584ebd8784f52704b
font_02_sfnt_off0001250d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250D 17104 bytes
SHA-256: a7969cfb906d5df1a1a4a34f19aed2516d07f8ea9b46746b85c8821151b8ba1c

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