Malicious PDF — malware analysis report

Static analysis result for SHA-256 9522c35e093e514d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-13 21:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7ee7101dd4dbb9e819908d45892453e SHA-1: 27530e37358b1a4d84ec45f77dfd9aadcb3f919d SHA-256: 9522c35e093e514dafefb5d8033d3a935684b84a99932b9dbf4023183af605f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://titibbs.xyz/js/ckfinder/userfiles/files/35365872050.pdf In PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/84964410377.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/49218778095.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/ligujuwekoga.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/mobenine.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/61707364318.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/kpa2p6da54mrlgkeejtnlilth4/tonapowinazijivo.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/lalakim.pdfIn PDF document text
    • https://signika.pl/Upload/file/voworoxejibus.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/47455739023.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/80127472530.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/57066251272.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/nozufuxorexapajiwisiwuk.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/wixibaxiwokarozajonawowuw.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/vamusomogewagegol.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/jimisokimofadoregakoma.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/83361067442.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/basurofigevales.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/10358592926.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/bitadafogeririnerem.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/xerokiratubafutanet.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/wotijorixamufinixupe.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/66146549464.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210906_055851.pdfPDF link annotation
    • https://xn--psg-9lac.hu/files/files/67038470988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=watch+captain+america+winter+soldier+online+free+123moviesPDF 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_off0000badc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADC 17440 bytes
SHA-256: 86ed4035d2508507527cc0380cc24ce721e6160a1f654296ad35af52e9e24101
font_01_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 11372 bytes
SHA-256: 38b48f9b337bf5700b3d7804bb58a789df8181cff689dabbe8e9c7043a4e7b0e