Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2450fc244b01106…

MALICIOUS

PDF

195.9 KB Created: 2021-07-16 00:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0024f6f2cc7461d719ffdb2074246c33 SHA-1: cb7428cc3acb8d7c5000faa394103c7fe42da7d6 SHA-256: d2450fc244b011066263b51235692c82714aaee1bd3526acbeea06ee8c0462ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9059

Heuristics 5

  • 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.
  • 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://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/2a2b44f59a516fcbb655c4ba62d8213c/nudijoropapitub.pdf In PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/zeneferigurupewa.pdfIn PDF document text
    • http://klpa.net/userData/board/file/37095702489.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/xumebapuxagedelale.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da8e2b3abb---ragifeg.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/jomasafixe.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210609_6185FD0597999E52.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/5083819189.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/ace4cdb54b45d7f4548f91659527435e/12318870626.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/bokaralogabademovosawuvub.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/4147a7f71c05948e14b225256911b342/19457441924.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/33n1mhtajk3olocq9ne067gj53/27345528012.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/82208806591.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7ea0679f2---purugivixirado.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6n0ackpdli8co6mmqdril16fr3/30466326554.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/59225869861.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa75d5b52e2---wozexakiroxobaguxak.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/mabeviwexariduwupigaxol.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/43876339946.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/foxufomi.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160880424f342a---maxupapebawitugexegobuva.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/zivujidu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36f55d7f0---fekinimototigemovikeja.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/gifuvawovedalipajuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=appropriate+use+of+apostrophePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24AAB 19760 bytes
SHA-256: 890a06ed344761f2c11b0f0cf21dd1edbca52039b0dec0085fd287ba6fa25aa2
font_01_sfnt_off00026d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00028585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28585 3596 bytes
SHA-256: 34686852e0dcbc0706cdebee6cabf9c6b0d4d972104e09d2e98ca5405b362a88
font_03_sfnt_off000293d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x293D6 36792 bytes
SHA-256: 5701c18d5448b0e61f1e455df5e0c422bf7cf9058940c575f511ff607aa7419f
font_04_sfnt_off0002e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92B 10388 bytes
SHA-256: aa826b435bb54fa98b58f15b05b3ce0efa6244c98c1297eda3b76b26af6f2a41

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