Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2d1201b2cb44ae…

MALICIOUS

PDF

86.2 KB Created: 2021-09-19 09:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9c97effa8430445a9de4b88f35cc2e01 SHA-1: 179543c375c3c7b41757681e8ec1dd628dea275a SHA-256: fe2d1201b2cb44ae9cadd477bca97507bd7f245ad7c25eee85dc3b1d274d5208
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of numerous external links, including a link farm on disposable hosting, suggests a phishing or malware distribution campaign. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack, potentially involving a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://ketchas.ru/uplcv?utm_term=how+to+remove+pattern+password+on+android PDF link annotation
    • http://mrpokedb.com/uploads/files/begazemutukumuzi.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/misemetirukipitidototede.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109080015091358.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/60409771455.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/womuzetewabonawatox.pdfIn PDF document text
    • http://wwsm-us.com/files/file/22016580922.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/lulosabajaju.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/27064656997.pdfIn PDF document text
    • http://azizolace.cz/images/file/sejixelepogusaferipojilem.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/bivadikilepi.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/vupudoluv.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/8829501129.pdfIn PDF document text
    • http://onelove.cz/file/21618239362.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/gujibogifoxefokelul.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161366be0ab9cb---77696553706.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021918723399079.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/kumete.pdfIn PDF document text
    • http://rayer.cn/d/files/zebudazazigisiwugitorilul.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/juregof.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/duguka.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/94102269888.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/kopalejis.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_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 18168 bytes
SHA-256: 17027e9a184784b7b08a5566df8264ab5688f76a8e1e861110c1b3b370d19661
font_01_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 10652 bytes
SHA-256: d8f198ad5786fb23adb98eb2ec65db3948c3d7ba594de831ae551daf01d2a86e
font_02_sfnt_off000132c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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