Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ae6ef39abcb281…

MALICIOUS

PDF

69.4 KB Created: 2021-09-18 10:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 63f05a93a285ed704df2eb5bd449b763 SHA-1: 4d7f6a9ec3b5de50463f09943cb296b6b2c878a3 SHA-256: b8ae6ef39abcb281e859973c81740a973beed00619004c4a08503bc88ae3c22c
184 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories or disposable hosting. The 'Image-only document with action trigger' heuristic suggests it's designed as a screenshot lure, prompting users to click through to malicious sites. The embedded JavaScript likely facilitates the execution of further malicious actions or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://nomylo.ru/uplcv?utm_term=how+to+download+youtube+downloader+in+android PDF link annotation
    • http://minhledtran.com/luutru/files/23057255390.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/12715045647.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd66303dd3---24717677908.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/36171619487.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/54195593344.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143cd3e9769d---51984272092.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/xiwikakafonolafe.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xidunuvegabatigemileli.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/2425903396.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/70928405449.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/62464622937.pdfIn PDF document text
    • http://gyliver.ru/files/files/kedovebowoputib.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/18372649838.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/43074104671.pdfIn PDF document text
    • https://preciseenergygroup.com/media/90529259977.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/66017552277.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/fujupimizud.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/95032580549.pdfIn PDF document text
    • http://jonme.net/ckupload/files/59492268620.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/jixararorowibejefajimat.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/54c9e14b1fe48751337d654acb7ae884/wazovozotom.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/49983544783.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/45063056356.pdfIn PDF document text
    • https://equinox-e.com/upload/files/modajopuku.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/babekevevuma.pdfIn PDF document text
    • 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_off0000b3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 10504 bytes
SHA-256: f9a8c85ad844d281b1bff989bb4f6963bc583c5991200174c1603e8cc6508b16
font_02_sfnt_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 14148 bytes
SHA-256: d5d8ab2cec0759d55de2ebc84d768d30324d9fb2897fc4ffd56c43eb6ed43d82

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