Malicious PDF — malware analysis report

Static analysis result for SHA-256 004a49ae6344a2d2…

MALICIOUS

PDF

85.4 KB Created: 2021-09-20 02:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a339af2250ac49fa4bc482c2e484061 SHA-1: dd377dcc47705edb5a74550fa0cb613fdefac4cc SHA-256: 004a49ae6344a2d205a3493ccc1b0373426eb978b332e5b7706c2a48e7833840
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous embedded URLs, many pointing to content management system upload directories, reinforces the malicious intent of redirecting users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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://megacook.pt/site/upload/file/jemajonirebala.pdf In PDF document text
    • http://ceomit.com/fckupload/file/61671787182.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/2841336374.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff92d6c77f---32608418966.pdfIn PDF document text
    • https://menu2uplus.com/images/file/padozeres.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/vovitazudoreludibori.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/71971249671.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/movisiveworavono.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614275e0dcdd7---94481771728.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/89320053408.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210918_192039.pdfIn PDF document text
    • https://niagarablock.com/application/webroot/userfiles/file/rexebomaveradigelo.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202197_145836_199.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/xekotago.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/xobalotegujijenuju.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/bafeji.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130614f1ec0c---91897834894.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/zedapabazu.pdfIn PDF document text
    • http://lactopad.com/uploads/files/lodaruvumasa.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/kupejowefidiximepax.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/35653931678.pdfIn PDF document text
    • https://ka-base.no/images_students/files/deruj.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5f322fb08---mewutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+hurt+locker+tamil+dubbedPDF 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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 10656 bytes
SHA-256: 1ad112863d13e7bd5ec2ab001a85834f15b36f4755a9cd258585ce8f7baf19ea
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 19756 bytes
SHA-256: 7de24aa989f7408016fe34da94e56ea68aa8b3dff011cce4ea22cb2c0c45cf82
font_02_sfnt_off00012ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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