Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4206bc234f116a…

MALICIOUS

PDF

82.3 KB Created: 2021-06-30 02:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c6581ffbbbbb144ca46c81e5e73dda05 SHA-1: 9f39a00818847b8b3e80ae3dba7172afcc4878c5 SHA-256: fc4206bc234f116a6ba8da0a499bcdebda2ecd6835700884391b0b664883a40a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080742543c8e---jetivijejogonan.pdf In PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f4416fa3e1f4fd231af838fffe1ef740/45423772537.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/dagovesepinovigotupip.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7e3r5hi7sn0om6o046avjo91j6/93948170334.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/90529436142.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0c4348e47d3d7351d5e676be7a602242/puwanonifige.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ec348f115---44680462067.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/xabitineturudexokan.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/48958472296.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/benedamapelo.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0a79db8f344bb95a44a0f68b68d490f0/42588855738.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b80aa74fa---fowew.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/1455669886.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c1a6d676c---44529104350.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/gazuzepupaxerolilidedak.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607270545499f---wuvikek.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/apkpu0m3911bjvmquaaim9ar7h/mipejegimesojijuroz.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/momap.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9799f9c4c41cdb3549d968a3d39710e3/29051451218.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/50905953b3c4fe5e4c8717823e9ac028/58605833013.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dc9d53dd340578adf9f008ab6178e869/gebunotanakemaginatuzer.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/f7ca724eee361b9f2795d159543e981d/depukodumezupafugifaler.pdfIn PDF document text
    • http://imi.vc/upload/files/kuribalojuk.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d0b3a5d15709068baf91a68b542ac115/lafixijakowageno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+save+a+indesign+file+as+pdfPDF 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_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 16832 bytes
SHA-256: c39af02d867201b46e583c3c902d5c0a167b640516b3fef045a884f33b1b3c6c
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 10716 bytes
SHA-256: 44e264e6df9d4a5ce7eb0800097dae86d692e6bd85c3ae377b566dfb18e451e2

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