Malicious PDF — malware analysis report

Static analysis result for SHA-256 098a2104202010b3…

MALICIOUS

PDF

101.6 KB Created: 2021-06-27 10:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 601b506a9be439720bc0def03c838d53 SHA-1: d5e1bb9d6a3d2cae76bf340f3dc41a29cde26eb4 SHA-256: 098a2104202010b3e4c1a813cb78f9f50199e97cd36dd85e6a56fb3078882f1b
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/616998c230377a3f535d106f9437e574/beputasokuduwibof.pdf In PDF document text
    • http://varanini.pl/userfiles/file/28727158065.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/92543010813.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4bd02c6a27e19c61d5a6a0a02cbeeace/17097339735.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3017aada42---nemesitewajitatezuxaxu.pdfIn PDF document text
    • https://activepymes.com/pub/file/86654245458.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd912a4907f---58616999692.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8nj5gao250h7mftrpp165jpjd6/53578530986.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7m81l23qu9dm582f14g318ebcm/91729776894.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/xidimilafuxesiroraboniw.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/71366308318.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/8817754463.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ec1634f5---67721250775.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a29fc6fac8---pewewagulomebenuwigilovi.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/vatisipimixes.pdfIn PDF document text
    • http://axwelindia.com/uploads/750898745.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/mosupegujem.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/wiwazamogowenol.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/7d35ef1628cc9d1a551c618f2d485b68/zupog.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/josebepaberudodenu.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/90925115847.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/sukapifel.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a3a243c84---sorapu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f3f76de6e---direkuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=telephone+interview+definitionPDF 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_002_off0000f70a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF70A 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_01_sfnt_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 10380 bytes
SHA-256: 35b76ce6f9c15e3a7e410baa6299eca1c57847a259d59d19718a26f540ec9315
font_02_sfnt_off00012c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0D 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 22180 bytes
SHA-256: 727a9b72633fdf33c5a0f8f1fb91dd04a03cb7613a68fe4d4980a4e6c6fabcc1
font_04_sfnt_off00016ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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