Malicious PDF — malware analysis report

Static analysis result for SHA-256 48283a52002ca89f…

MALICIOUS

PDF

86.8 KB Created: 2021-07-30 03:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8a537d62f96f32fee15f6e070f41b3dc SHA-1: 1d5e2b5e857543617a82fb07f5dfd962ac288f8f SHA-256: 48283a52002ca89f96b5a9f6396fd29b2f335d70cc0d07c5fc5493a1adc2e569
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://btegypt.com/file/65493069523.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160845c1319158---54466533491.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b54e045f35---43627754443.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607302c637c5d---dajufami.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779ffc8f117---nanevujuxepigasapavilalad.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b1bd22e7---41514927374.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/xejufanefitewomipev.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c605e5729f8---binidifipirapetula.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/xaledagadebexezaxalixu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/aaeb4c4e50166b906d0f5a5715c2a909/74215522095.pdfIn PDF document text
    • http://meta-min.com/files/bujejudikerivuv.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/luribotuzesal.pdfIn PDF document text
    • http://www.bash.cl/media/file/deduletofanokikabogeru.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161000ea4d0470---jefakamogezos.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/25649630211.pdfIn PDF document text
    • https://cecprint.com/images/file/71316841870.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a98f12902d---tukujitipu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607484556c418---motonobixiperakavo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3d29fe735518fbd48a833e1d7b9f210c/43719103376.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/9803874db52ba19d8c5aee6daf11f97d/fudodetano.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c414287f515---46229965752.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff9ec8a6e8---66247808172.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/xobifonarej.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a45645777520867f2f6a7322dcf7864f/90848130404.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/sodakovamugapufijegezag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+you+set+the+sharp+atomic+clock+on+a+spc900PDF 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_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 16812 bytes
SHA-256: dfbbf08a0a0e8d8863c3450fb9c3f305ff45a4f4d2a03c3711fc5675d40a45d1
font_01_sfnt_off00011bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C3 11452 bytes
SHA-256: 79880b9cdccd272f7393dc9d366cc0cd246a1a553e2f23755b013ba0ac02cb22