Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e953324731e986…

MALICIOUS

PDF

204.6 KB Created: 2021-09-16 03:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95e79ac267aa5d5d5ae20d66ba9c2ee8 SHA-1: cf78595bf86f861e510f07b3df8460a8f57e1757 SHA-256: 13e953324731e986af8f1abfd55696f153148c350ea077149845cec11ea5c5ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised CMS uploads, indicating an attempt to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9329

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 http://telegid.tv/userfiles/file/tufaxupidupixojal.pdf In PDF document text
    • http://farmaciacogliate.it/userfiles/files/1684997155.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/tafefuwof.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/70603656085.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/39923189434.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161391389cebfb---32988664369.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/mitakelonepogas.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/47504614809.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feac1c2a08---rabulubukatafuwezirilame.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/8e54cc9795a3910e3d31e8e39d200328/35523354487.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/voligebogalixuferef.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e01c22d2f2---10534897280.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/76273581030.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/tirobalokazisa.pdfIn PDF document text
    • http://mweb.cz/images/file/xixemum.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/68164271552.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130accb89468---kumutepira.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f70904a5f---matatifib.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380047d0883---wovetogapulali.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/tejegepapijopobuve.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/zobamuketik.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210906012225.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/30998655743.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/gijazuniberuwewapizurenok.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/87924590318.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161414d38a2ac4---1887111048.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210915/files/20210915162520.pdfIn PDF document text
    • http://haokunchem.cn/upload/files/sonovazubet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=process+dynamics+and+control+4th+edition+solution+manual+pdfPDF 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_off00028057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002986e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2986E 11176 bytes
SHA-256: 7bf207c288c163e388ced45d5d108e590ccddf72b2f42b3bd45296b76067d558
font_02_sfnt_off0002b270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B270 17580 bytes
SHA-256: 3173ab4e64fe23ed7f590b78232c11089b9abdf8a1d43b1159f5df54e56f9953
font_03_sfnt_off0002cdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDB0 1964 bytes
SHA-256: cb83427253be486b5dc35224710cea1d2a27078ad6da64da340d8beb93dbb3aa
font_04_sfnt_off0002d6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6C4 30668 bytes
SHA-256: 239dee280fa5e8b5fd0f6abe859c6aac7de090e8ddf94950e77a30322fda3384