Malicious PDF — malware analysis report

Static analysis result for SHA-256 c127ee489918e02c…

MALICIOUS

PDF

98.1 KB Created: 2021-07-24 20:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61775d4c9e8e43e960b87170017b40e5 SHA-1: 865717fcd041fc261d3f116711a44ffc38a195df SHA-256: c127ee489918e02ce9fcf712aa319e717558f48738fcc543d47ec3428d4c75d0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Multiple heuristics indicate the PDF contains a link farm hosted on compromised CMS upload storage, with many distinct hosts, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/ccbeedcaca3c0779d2597eebf02ba7f6/62373627077.pdf In PDF document text
    • http://amphorabeautyclub.com/campannas/file/34682445131.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/78158256789.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/39385656506.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/c448c067bffea3662237a7b7c6e215f0/24762283808.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609659f2785b7---63932790557.pdfIn PDF document text
    • https://people11people.gr/uploads/File/5377451863.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e65ee31d3---nazarufasavikiromaduvigax.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/suruvozajodejaxipolikovuk.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/db655af8c068e8d7a6b5edf9d4c1fcff/norasawonosuserivisajo.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160accdb9f15d0---tovavafekivanodaweme.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d975b529---kofidoxakoweja.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/40495716479.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077904ae8e09---verulebigopemadezarezemo.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/dc5b5c5dc318bb4a065555c1b1424ac1/fogevakulugusozag.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/pepesotabipududole.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/waxinorivitigegakajisijej.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/85029677053.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/polajawetixugalodurizugi.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57b7ab666---26409175403.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/laprkeu6a9v1rdttn2gc8i9bgc/bigulomosoxugek.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/53373130882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=is+there+a+second+part+to+the+coldest+winter+everPDF 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_off00011a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13243 17432 bytes
SHA-256: 4e5918eddf78348a99c374ff8b16262f234115cd3a1305ba95046b9e743c4a0a
font_02_sfnt_off00015fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB7 10716 bytes
SHA-256: c18e54f2f245aa0ea48f602e86ac4e5e0b7a21bb6e4e4181df20c7c40655e409

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