Malicious PDF — malware analysis report

Static analysis result for SHA-256 5929c18fddf2562b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 05:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1440e3678da462b1d74824d30b66e222 SHA-1: 0b2eaea852d35717d1ebedda9a60383afb5ad0bd SHA-256: 5929c18fddf2562b00aecbacc5933c51ae2bc631fe1e89652cd44105b3aab0a0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the nature of the URLs and the PDF structure suggest it's designed to exploit user interaction to visit malicious sites.

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://lateonsettay-sachs.org/userfiles/file/nutogorawu.pdf In PDF document text
    • https://adikkeempat.com/contents//files/41261771508.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f2188560115---22506331308.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/38263759e50dbdc09d2ee9a669d627ae/nejutogovudefog.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/92813288650.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/93870061596.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/3536399870.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71ed4a9af---90988394708.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/kogode.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fb54a009e10---vizaludizadu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/47545d2d6556b13ad2203b0120389432/sudebevefawof.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afddebbfc9f---20265199130.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/67707216718.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/durezejelogojibinakes.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog//file/kuxopofuxapefugewep.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160833e68d92b4---mefatizinejupu.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff826ece720---xokijomirenuxogudo.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/54b829265aa4529c281395dc5d96e735/63651137924.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xatona.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1dd23f9ce---9196894487.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/bimalezotukij.pdfIn PDF document text
    • http://fxmeat.com/upload/file/fc068a1f911b266e2e99e013c2e2c2ab.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/zogarejajepobafamozu.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16110c4767f79c---8232533297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=us+covert+operations+manual+fallout+4PDF 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_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 10892 bytes
SHA-256: 3b39cb551161d1a391ea26d4dd1f2cd296462f39b39b2c9c870994630e1999d3
font_01_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 17436 bytes
SHA-256: 100bc01d076d3967b212a63cff9d39df69a6c9d8baea7f42567ed3dc3aaebfe6
font_02_sfnt_off00011f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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