Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ff5bc2c6c45d0e…

MALICIOUS

PDF

114.3 KB Created: 2021-06-30 01:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9ba1de67498ed06f633f5676bb6d916b SHA-1: 2e38cd0df647979db8f3f535f065df6a38d77b00 SHA-256: b6ff5bc2c6c45d0e5ecfebccfb13d27b94c978526035f7674fc45aa650506203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

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.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c32b73b8---gopipojesanaz.pdf In PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210606_C0EC68E503C9984B.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/vret2qfc4lsbl42aknj57c8r64/lubowidomimudobe.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/63408216814.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/51352356893.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kajcbqkf4bcfnriimgord2rmak/gulub.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/makis.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083da3525b8f---mowobijapij.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acd2944f2c---71984341791.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/31161367550.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eabdcdc49---lewirofuzatisipu.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/24472541117.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48ce6fc55---5533017592.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711edf57a8a---10559377993.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/60e23b49812d14378a50ab1e9a4214c8/73482368695.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e0c3df54a5e380198182e512b9a7a142/worasilumegarosafamixi.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/d81d53cd409a2d4688c0aae1214d034d/paferevutozufez.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/bolunibifajimelesomana.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/1d85b36f1af5ffb1ec4a29a12407a4c9/40298040791.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/82d80ed92e2570f4bd373957e7fcca73/gebiwelurabeselirolajep.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16079001c12ed1---vaxadazatujogenirewidusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=intervening+opportunity+ap+human+geographyPDF 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
font_00_sfnt_off00012bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBB 22728 bytes
SHA-256: 5187c968d343d7908a889170b3dbf8ec0e6de340d60aa8de9a46be6f5d982c08
font_01_sfnt_off00016458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16458 18040 bytes
SHA-256: 18ffe99bfdaa6fb592028919d38262793934dcafed9df774938e16406bdba8c5
font_02_sfnt_off00018093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000198a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A0 2216 bytes
SHA-256: 2dbc5abf9ee6906daa3684114a45b7519cc87ecbf3f155ffda15e5d8d2c90831
font_04_sfnt_off0001a274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A274 10716 bytes
SHA-256: 240414fa6e85dc3f49724dc09f5166aafb7553abfea3afaff428724648de7a67

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