Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb664fd1c75ff94…

MALICIOUS

PDF

321.3 KB Created: 2021-07-03 01:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e2f66514819672a8990e00f6193624fd SHA-1: 78a292228805d61bfba46d21825332911d9da7d8 SHA-256: 6fb664fd1c75ff94fd79052c7915a9cb3ff3a3b2a6f54dc144a461cd986298b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised CMS upload storage, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to trick users into downloading further malicious content, likely via a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dhi8erk8gstqf0ha7ufckvr803/mavabajisumogetazekijaz.pdf In PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608752a5ce4ff---98883068451.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68dfb7b1f---46385306249.pdfIn PDF document text
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/98902345211.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/96638140088.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd357f4163---bogani.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/79588753556.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a1227f764---femotinipajo.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/86013893793.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/70205043636.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0lvcouj0r3bg1g9po46pmc3qr3/fawipatotibofuvakago.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/maziwometez.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d867f17b972d26ea1d1bbded9fa45ede/5452205449.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9b82dc8aee0a1c1b8bd0db1477c5220f/nofopig.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa27878dee---xaboxogawebokar.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/21282182065.pdfIn PDF document text
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/zosenusil.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/13176452815.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c502d38ec35c0bb7456ca47bb885aed2/vakalapevugapigosutelop.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609def0434f1d---14067002698.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/39359909886.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/hp2k509q04pf3nnaa7iad50dlv/tunewepakomezefuwusojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=syn+cole+got+the+feelingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00046c39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C39 20680 bytes
SHA-256: 657f43cec9cbb078f6179d8f0ab6fab109b3868d3ebaaba56d3cd841672e2556
font_01_sfnt_off00048ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0004a802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A802 21848 bytes
SHA-256: cb7b07f0749e2c5f9cd7597add317b512d70f6c834270ab2a1212e28c1d347f9
font_03_sfnt_off0004df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF9F 10376 bytes
SHA-256: f4d8e8b21ba5b62af4c7af5370bff416ab9986652f87b88a76ec4457ce6f78a4

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