Malicious PDF — malware analysis report

Static analysis result for SHA-256 947d320685a1bc32…

MALICIOUS

PDF

78.8 KB Created: 2021-09-04 22:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 159bcf7308be38633bd841b16fcd0204 SHA-1: bcee056710fbbe567c7f69db3e285a3ce66498a6 SHA-256: 947d320685a1bc329edc3fda44ec2f12a7b0678c5edb56464d8435f12531eefa
172 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links to compromised websites, suggesting it's used to host or redirect to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e171a7c773f---51644161676.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f2c7f0138de5d74aaec92036e8f1e8e5/57940788313.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607b98f93fee1---tikojexovokolamifugoxaj.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/86e15880591e038137be7fe5e4f9683d/sefelujexotu.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/63113121091.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855079c8b94---rususuf.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc0376103---xenopegegosotudetijar.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/fujolimasobogugagodora.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ab8ddecfbe131a7bc1af1ae7af442ff7/rivotatujuzuwulafasa.pdfIn PDF document text
    • http://gro-felix.si/uploads/53278202270.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9d7a44c8---19852490653.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/35599325127.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/nefikofu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/7778331e0b67c2397d847c75bfe297f4/50127354500.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/pabofovazajosumelum.pdfIn PDF document text
    • http://attlas.center/userfiles/file/jumozojalidif.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acff166de48---norojezuloj.pdfIn PDF document text
    • http://oodow.cn/upload/file/210708080506874305aggxvhg959w5.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/21918945845.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae4e4d6874---26883643253.pdfIn PDF document text
    • http://e-hematologica.com/users//file/96490221917.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e983be299---mawid.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/memubamasotazavinized.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef5213c687---56620413696.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac813871120---44863553552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=interchange+third+edition+intro+workbook+download+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_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 19668 bytes
SHA-256: 39662b9870d6a1484882e1f9bae06bd9f3e9c60d4270baa5a361bd6f0b9763af
font_01_sfnt_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001144c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 11000 bytes
SHA-256: b612b2a4918b7ef5dc3456e8caa3600cdade7b4a7e6b083a849752de8e05c71e

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