Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bbd00486fbfee8…

MALICIOUS

PDF

71.9 KB Created: 2021-09-28 16:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6614718f80640407132b3601fbdbe04 SHA-1: a0e3405aad7b71a72f2c7606a6909fbcb534119d SHA-256: e6bbd00486fbfee8f122be5847dbd803b9dbe7e713d1bf988e15d68c7f610dc7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable hosting or IP addresses, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://shibbirs.com/media/files/41127594500.pdf
    • http://185.33.116.145/~acus01/upload/files/10240152187.pdf
    • https://serihosting.com/calisma2/files/uploads/ziluwuvavivuvejasiwoxe.pdf
    • http://concilianavarra.com/userfiles/files/vobadotek.pdf
    • http://duhochoangthanh.com/upload/files/vewunijosememumanaxonu.pdf
    • http://nordicwalkingturak.hu/_user/file/63555436665.pdf
    • https://charlesstreetvideo.com/userfiles/file/41647068511.pdf
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210928_25974B5EED0803D2.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161381fd2bb6b6---garopowevejotaz.pdf
    • http://maytinhnangdong.com/files/uploads/editor/files/90926439970.pdf
    • http://nuuts.mn/uploads/assets/kawufoxilosilunixovu.pdf
    • http://89928386.com/uploads/files/202109140335162747.pdf
    • https://phu-komplex.pl/pliki/file/26905395865.pdf
    • http://popmetre.com/news/files/54056963937.pdf
    • http://unityproductions.com/upload/files/40799580849.pdf
    • http://hasadtemizlik.com/upload/file/tasowukawajaxuxexun.pdf
    • http://abworder.com/uploads/files/ramogizogilug.pdf
    • http://karthikeyanjayaram.com/userfiles/file/39508773328.pdf
    • http://kastely-vacduka.hu/fileok/file/91165067034.pdf
    • http://studioboscono.it/userfiles/files/64137155227.pdf
    • http://esipro.lu/userfiles/file/1384297333.pdf
    • http://opuspointpartners.com/ckfinder/userfiles/files/melupuzuxu.pdf
    • http://travellightnepal.com/userfiles/file/90172033384.pdf
    • http://yuanjiangchem.com/upload/files/pixoxig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=a+quiet+place+2+hd+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b415.bin
d46c5d9cd9da9242cd7b69e25e5e6db8ac6f34d344441723a01b0a2e32b88b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB415 17172 bytes
font_01_sfnt_off0000e013.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 16792 bytes
font_02_sfnt_off0000f82a.bin
02406658ac0e059ac247a2c9cdef149564f4dc341e78582b1e177329fa9b64d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 10688 bytes

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