Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47ff62927f44cb7…

MALICIOUS

PDF

94.9 KB Created: 2021-08-12 00:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 50f61e8a0a894ebb3bc383c2391d040f SHA-1: 250cca7a5dd3b696d39b0a2f4ab36f7b87ae976c SHA-256: f47ff62927f44cb76a32fa4597d3807b52c90091b22fda5d37eaab1516192235
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to direct users to external, untrusted resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/74931881437.pdf In PDF document text
    • https://autoskola-scp.com/files/10132847526.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/665982064.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/negetupabirosupemuziwene.pdfIn PDF document text
    • http://sam-global.info/files/file/94266963188.pdfIn PDF document text
    • http://short-story.ru/upload/file/kekix.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e21107e30---vakenedajugufos.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/xuxenewazit.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d3972b68b34---visadow.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/58353117794.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbc55b53d0---46324579449.pdfIn PDF document text
    • http://pb-book.com/user_file/file/42338564618.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0ff4bbb35---xogeveteti.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/kh0ar772b7m9toaspld05g3r36/91426641555.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///23904875644.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098773ade082---deloxojapiwajajo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160922df132ebc---73545155490.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/4165285432.pdfIn PDF document text
    • http://rfamilylucas.com/clients/73238/File/94625932350.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/8711759392.pdfIn PDF document text
    • https://chpcentre.com/files/file/pujazipijawidaleduf.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b2d9efb73---xudibotutiritojujizim.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/lmv3v4dtgm49nb2u1j0oaqr1sb/56629010243.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608e256bd8ce0---52700599919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=le+participe+pr%C3%A9sent+et+l%27adjectif+verbal+exercices+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 18880 bytes
SHA-256: f4228927a7a039176e8ae45581396e07f2d0192595421bbcfa258c1d1e60a988
font_02_sfnt_off00013b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5D 11076 bytes
SHA-256: 8b4bc84bc24001f946e7ecb61cbf525c42371cabb078bbd874694654d6c28ea3
font_03_sfnt_off000154d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D0 16252 bytes
SHA-256: 6d568972154aa9e6553788066da68fe6d5b0b58db67a92e881fdc4c3770f4e1b

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