Malicious PDF — malware analysis report

Static analysis result for SHA-256 2522d2f33195cb8b…

MALICIOUS

PDF

82.0 KB Created: 2021-08-23 12:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a1e20ee9d2fd8f8907c4d29628581252 SHA-1: 16b9033e42f6d4a0dd1f30510aa9c155606f634a SHA-256: 2522d2f33195cb8b0fea62ff18e009369a81c5bc779e92f62a73612536e84ad6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an intent to redirect users to malicious or phishing sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/2kqvb4imdjv8urqscp23iesgb5/88024921088.pdf In PDF document text
    • http://morard-mcf.fr/data/Files/9890077279.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160784e503ea8f---woxuzu.pdfIn PDF document text
    • https://dptech.vn/uploads/files/logedulib.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093bd64c946e---88849331042.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/32793860163.pdfIn PDF document text
    • http://axwelindia.com/uploads/25808481345.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085ca6d5a338---vajolutuwosuwik.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/80161372316.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/damejuto.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/diwoligugafivuxen.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/janafilusaz.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/vudedewijigomivu.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b7e25b836---juwerop.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/40769603313.pdfIn PDF document text
    • http://mamitobe.ru/files/file/dominazefixalajipifif.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/tojol.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075405fcaedd---50510027381.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/vedolunafizokaz.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d355cfb0a---mifufatefuwu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6d2b1b885---gebumenavewusamokomoxaw.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/bokobojudakasisikuguk.pdfIn PDF document text
    • http://candientushinko.com/images/file/57115008754.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6b4363c45---disokogiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ministry+of+information+and+communicationsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 16348 bytes
SHA-256: e7d058b6d4b7a97187f6998adbeb143d154324107a6ed8835e286c118b4f54ac
font_01_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B5 10668 bytes
SHA-256: 37a34304ecacb7310b68170c881605e09533f22e3d2129910a5251b6f8f42b3c

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