Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28514a34dfa0ad5…

MALICIOUS

PDF

106.0 KB Created: 2021-06-27 08:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d46c10e00cf4d24446a781490feb0fb5 SHA-1: fbf9458e31f78db6bea23a974bff02b617f84474 SHA-256: a28514a34dfa0ad503f406291050ed33fd3928410e7250475ff1224c9311ab1c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084a3cd8c7f8---biruxefarirowerudupa.pdf In PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pqca0nab3k9b7ej519f6scpia5/jusikijuwutetekal.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/19c4818ef4a60481bb950372c8a84dd9/wakojadebajovunine.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/b45c04923b27663df7fb776dfc89d367/giginavevezebodisawo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ec1e42679---96986755164.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbe9181a3f---gonixirokobuvuzadi.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7iikkatbjlmgh8jn6s5u36md03/zovimebuzamoronu.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/78818017092.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cccdde7a326---24443808979.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097da210aaf6---18976476454.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/vudugesebus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77444750fc---ladunibelul.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/nizaluxewapev.pdfIn PDF document text
    • http://boxethai38.comupload/file/rafavekususawatav.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9920f198fe6141a7cce94e65d869e6a8/42440619823.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/5f71810c13747e7eedd7fc8d8d6297ea/75043652472.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607217a780c01---68907905791.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c725739b9c7---42618430115.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/49715889194.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/46720deb75e9166cdc01315e8b85857e/tujufinigakadisi.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/xijipi.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/03/30037301685.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/wufirudimidikekifutaleka.pdfIn PDF document text
    • https://paperland.bg/uploads/file/79071316940.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/79faa1b1b5a4930f3da094e9e9b19ecf/ririp.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=kingroot+apk+android+8.1PDF 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_off000113d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x113D0 25444 bytes
SHA-256: b763fd99f73d1290422cc27379c7f7e0ea0537fe7f0f20a0f40f92d3943fba90
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DD 10632 bytes
SHA-256: 60febd8a513da1473fdfece59b28c8382f0f690448712e9f1e422597e933628c
font_03_sfnt_off00015a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A19 18740 bytes
SHA-256: 5deb1f4646f697e38ca5cecbde366d75b6d67cd64d09f6e8a1ab57beb0e8afaf
font_04_sfnt_off000189ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189AB 4152 bytes
SHA-256: 68f99ac367ad89e648f8570815b53dc73cb6b1c2f6c223a54ed06eb5d4e61ec3

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