Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2514cdee1be1f0…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 19:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9dd40667aa3cf40aa3845615aa4c5990 SHA-1: 379c771be6a9a14f4e7f2becdb405a06b9384e77 SHA-256: 2a2514cdee1be1f041474d85aef723f2bb77c05288187b1774e7f1bf772fe7e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains embedded JavaScript, which is often used to redirect users to malicious sites or exploit vulnerabilities. The presence of multiple URLs pointing to compromised WordPress uploads and disposable hosting further supports the link farm and potential phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • 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.
  • 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://infoenergie-loire.org/userfiles/file/20922617327.pdf In PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/t89imv1jedc5dkp20fm4lri503/bapelexojarerovujoki.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/44754923213.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/rofapekovagijugilamize.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/vifukimudeniji.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/5039509638.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/r87hj1tutr450ulr75gakeul7q/68926543069.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb0a7070ee---82798622063.pdfIn PDF document text
    • https://ridersshop.it/file/27946791273.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/63784892202.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/vqn5det0ie7on0b4oshvfr2jm7/ribakagufusulusis.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/92107822688.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/fesomakobavi.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/82911094295.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/88083802862.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/nisamugevadilikirus.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/guzubij.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/tumemojumajuxipamegupeleg.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/tadafekazovo.pdfIn PDF document text
    • http://geraldinekilkelly.ie/45893162863.pdfIn PDF document text
    • https://tipresentoio.it/images/file/zupig.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/mkah1lh37jp6ao8vujh8j74pc7/3675676392.pdfIn PDF document text
    • https://dii.org/10.36762/jurnaljateng.v18i2.833In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=jurnal+tentang+pupuk+organik+cair+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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 10812 bytes
SHA-256: b5b814f1a57fe8801eaca3c72842d2856b3ecf502cb0110c66dc004f225fe986
font_02_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 18396 bytes
SHA-256: b96ed0530cebd2565a67587ad1296aca27b1fd2ae608f5cc16a0b38a3b540c1a

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