Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fb2e3578dfee06…

MALICIOUS

PDF

77.9 KB Created: 2021-09-07 02:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e81c1c37b9520e62487266308feede06 SHA-1: 8e863559053d433e82ae5f67480a3e1cb4f88e3c SHA-256: 62fb2e3578dfee067109f9242a4b072151a1fb8be28a94ac83790efe11c355b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://wecareprogram.org/images/file/74447933830.pdf In PDF document text
    • https://egokituz.eus/files/galeria/files/56076249859.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202108310035133173.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/vusinasotisuruf.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/58777ef754cd4a3a86c140476b0cb7d6.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b0243592e3b---duvoxelamiz.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161188489abb55---94915169751.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5569efd33---bobezufuzozowoguluxagik.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/totimabugufezedotajeveda.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd29e9a59---tatuzipalaxinekojak.pdfIn PDF document text
    • http://caf-ljubljana.si/docs/tukuputitiparevel.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/85444580855.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2882a2347---72834836959.pdfIn PDF document text
    • https://autoskola-scp.com/files/54941184669.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f13fde625fba2b14093969fd10689221/povopogemapizifizojer.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/d10bbed67139f56ca874f252fd4cce9c/jujefesufofufepofu.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sr76q9ldqmaru9mjldut6i6oj3/ditifizukedepapa.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/korepaxemitejokovolojawis.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/mowokufisajepa.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/62826559009.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/topuligesozomazutuj.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/1465910010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=que+significa+migracion+pdfPDF 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_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 10976 bytes
SHA-256: 198a3fbc128b200f8b13823b17404f80c73f3cb99d0bc29a07f94bc6793979b1
font_02_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 18424 bytes
SHA-256: 9a16e0e4d45fad972aafb6536d2c4dd9d55c592fce5b1df4ca7b6f2fc10d82ad

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