Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee844cafdc096d71…

MALICIOUS

PDF

69.9 KB Created: 2021-09-04 14:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b442d8dd144efd840f1cfb94ec9f223f SHA-1: a464d447a9253bc03e16467d0f730172bdd24a66 SHA-256: ee844cafdc096d7128ddb5e3e25072dc568d241b821d040f953ceb55cdfa2440
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to various URLs, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content. The presence of embedded URLs and the 'Download Button' heuristic indicate a lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://khyatiinfotech.biz/ckfinder/userfiles/files/57610395325.pdf In PDF document text
    • http://jcpingie.be/public/files/71068285044.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/jabuvo.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/2097bb367cfe65233d9ff2fe2f92162b/94929354970.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/6005770907.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/11918560124.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/dcc70459b067e50c71f171f7d88ae50e/xiranuwigowefexizej.pdfIn PDF document text
    • http://0930actress.com/files/files/3252520534.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/33324481069.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/o047ts659v3mdiem0k4mo3t076/voritujewovo.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/xafitezaneliguf.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/vexininit.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/favikatizawa.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/muwakufexigezinepomuvuzex.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/kesivimigezuworamibaxut.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607598a6b52e7---53302378404.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/12281698543.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jekogituvitowezowebovi.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/lulozuvomatevugu.pdfIn PDF document text
    • https://primer-spb.ru/files/files/tobulumawunapeserajofewiw.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/g4peq22npkefkfdmaftv7vr12v/39720216870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=verbs+worksheet+for+kindergarten+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20F 15556 bytes
SHA-256: 25307073ecba81de6c0a8f9659352c74c445bc0ec488f43b173635f7a9bd97ae
font_01_sfnt_off0000d95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95C 11016 bytes
SHA-256: 9484a424df7821a059d5cd6778a22895bc03b17e49eccc91bbac721ce300e255
font_02_sfnt_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.