Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dda4c49208a221c…

MALICIOUS

PDF

82.1 KB Created: 2021-10-15 23:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ce91d17e9122b6248059d43d417773ef SHA-1: 9456da1fe767238b9ecf4f8cdc338810aadfe7c3 SHA-256: 5dda4c49208a221cbcfb24458b4aed989dcc0c17a5e3403ff8415b9de4c48f11
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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 https://kochitaxirental.com/ckfinder/userfiles/files/22600137219.pdf In PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f74552ae18---62913024248.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/sekawo.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/7d2rnarb6i7mmuhlc82fec7271/nuvowewosif.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/33163122450.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/xixipitofakororimud.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/kivalosejimewit.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/3487116903.pdfIn PDF document text
    • http://odumakus.com/uploads/files/57693754837.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/pofeninoso.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/sakujipejo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613688c49f4c7---77348826970.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615627cb3beae---31503804624.pdfIn PDF document text
    • http://xtra360.net/campannas/file/mopikanepokeriwexikilaf.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/ruroneselodeparojazukiz.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/23694262412.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/93030817368.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155bd5bef94d---tanowuruvivepopuduk.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/telowopijodesawe.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161600c1d9963f---tiwaw.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/vojegilibunubowozis.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/50023338040.pdfIn PDF document text
    • http://p-energo.ru/content/file/zewikegobatisademoz.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/2I9n2o-U8HI/uplcv?utm_term=low+hot+water+pressure+in+housePDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/39396157070.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_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 10444 bytes
SHA-256: 2d5de52529544dd08cecb230339c1accab2579348759a7f390739fcd51936f11
font_02_sfnt_off00011042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 16504 bytes
SHA-256: 4d2da4a242b539e5b1731175513a103dd9197ef0d6f67d395fd96173193edbd8