Malicious PDF — malware analysis report

Static analysis result for SHA-256 44837b7065e073ec…

MALICIOUS

PDF

108.4 KB Created: 2021-07-04 02:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6c1e12b27b51464857b23324c0d110ed SHA-1: b5d69c5b8229cfd0513947c678c07d4c7e40437c SHA-256: 44837b7065e073ec12130d1d2882160c5d10236eb0ed09805fbb162611b76aec
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites hosting further PDF files. These links are designed to obscure the true destination and likely serve as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d386d2ecb8---tidikumup.pdf In PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780db4822b1---79784649436.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/89327240816.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cea199176c---92367741051.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160747fa5379b8---rusulilugonugezemipa.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/50887ed621601e52c022aeb449f99ff2/palenanesebebofefo.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/82129917023.pdfIn PDF document text
    • http://thedreams.cz/files/35808196272.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/kewujimidiveporiz.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/nakojagudakunefaviniwe.pdfIn PDF document text
    • https://ivanamihic.com//files/rexowupogejonuvas.pdfIn PDF document text
    • http://babamoleskine.com/files/file/ginex.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609edae7e152c---xinibisoxadab.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/564d261ab7d18797d93e24c75059c83a/xewukejipogunilaxubex.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f8ac6bb84---86392635187.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/a315c63933fe3000d5e26c3bba8a543a/nenexaxanipibajilakut.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10bd85f3b6---kumuletijadifinetisew.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ftd87eh51rbdegct8fdnoug3qu/buxumabuben.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/49572366063.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/36820370508.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/655b5635e4c8ae8740947f6b37c6c159/86257187936.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804678632cd---tuvemixamopetewevilureje.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/o8kvbqda958ucnf27l3e8j84sr/72410262363.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5308accd3b85b0ebf6d14e6cff9c782c/berolo.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/e224cc56507d7ea21a2426f75f61bfcd/44362138663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=masculine+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00013f34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13F34 19888 bytes
SHA-256: 718d43f05480f3ef463ff84be197512ed40a404f74f3e9c704e2c4eaf2c24ae7
font_00_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 29364 bytes
SHA-256: 58006906166293216bc36a1834096b768bfbe35c6f12fb7c217568db797a7f94
font_02_sfnt_off00016191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001799e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1799E 4628 bytes
SHA-256: f7723be3f35aeefacfd4b07e56958d38c004add1bb8ed3339dc21e2a550e0eda
font_04_sfnt_off00018a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A50 10452 bytes
SHA-256: d7abf823cdd733e98b9267fd23f24c1f01e537dbeb2f3ebd9a8b505be2a44a9d

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