Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff14f7c8c416ef8…

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 19:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 61ea91fd9801212fe3eb65f47824de03 SHA-1: 85be5e20413e252ed0df8c940598093671373a1d SHA-256: 9ff14f7c8c416ef873e77a11c8289523b77cbf4d8d5aaf7f8ab699a3993baf94
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely attempts to download and execute a second-stage payload or redirect the user to a malicious URL, as evidenced by the numerous unknown-reputation URLs found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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 http://screen.by/images/file/winajapitarewakigajubonat.pdf In PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4137432447.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/30758888380.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/rujoviz.pdfIn PDF document text
    • http://thedreams.cz/files/jabixevon.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/sosuvuguv.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/32868203330.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/koxetugidaluga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f49ba0881a---gikozekutozemajixiwe.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/75667663662.pdfIn PDF document text
    • https://brakos.it/file/disajadelovomaraxij.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/dexudunejeleguxusajediza.pdfIn PDF document text
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/4244286772.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/dinosexe.pdfIn PDF document text
    • http://ropesadventure.com/d/files/55004789965.pdfIn PDF document text
    • https://mediaskills.rs/files/kuvumokanowokuju.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/21036995104.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/vojaxuvukizobita.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/30562000096.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/torepisatiratikeki.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/92426965629.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/dekawufawepet.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/koregudafujositopu.pdfIn PDF document text
    • http://ned.ru/uploads/files/vumuxitegujixobavobinav.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/93981521303.pdfIn PDF document text
    • https://phnews.ro/files/file/xodeburarigid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=spiderman+1+movie+onlinePDF 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_off0000da91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 10480 bytes
SHA-256: 025c1329557eb3ab9570ba8e922acda865ad9a902e0ec5771700639db5799333
font_02_sfnt_off00010a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 17272 bytes
SHA-256: 5e75be7e994dcb9582bbc7be5756ea1e1499d3a3c44a1e912a47bf089926e0ab