Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fad3c91e6f58eb5…

MALICIOUS

PDF

93.7 KB Created: 2021-07-27 20:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 696c55f7c698d37ecd78822cc16972d7 SHA-1: ab299a908660ce730ed0aadc5f567356d5279e1f SHA-256: 2fad3c91e6f58eb5b49fa97e7ce9a735af6371fa5d4ad31ddff89b233065195e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF containing numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of a link farm on potentially compromised infrastructure suggests an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9160

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/614a718fa4dc5626670bdd224d5adc46/71641340073.pdf In PDF document text
    • https://attack.lt/images/files/60862197250.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/31055331780.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/toramuzato.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/kasabovamorise.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16092554649427---42022294210.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b80b8dd92ce5a99698d6c45d4ce02fbe/53000855717.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/ludexewutep.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/91776bdef1e79aacba4914c585763a30/lusas.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083bf69abdea---pimujetinodo.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/47696226596.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/3gg72bnt7ve2htn2p682dpe9l1/solumevupekukenuramen.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/89650956981.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a195b9382---fujajotiwo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3a19874b0b3f4218eef13c48b48f1d71/wasega.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607708c7718b8---90526450122.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/cpulj2oq6tcddbqbis0n3ekgvv/dipujufetawazuzofonu.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/22165085031.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/82859412746.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/c02njprfm344di92l6ffpvd426/85445098601.pdfIn PDF document text
    • https://4appsoftware.it/file/75935670304.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/928691717f14bf5f0aabb52b158bbd4b/marizetijujageguxiw.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/11141608786.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/68182289140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=james+bond+all+movies+dubbed+in+hindi+free+download+hdPDF link annotation
    • 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
font_00_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 16852 bytes
SHA-256: 7c55cdd7d8781eed28e67e42d5fc7a12389925133a5b86399e19d60404e8ba87
font_01_sfnt_off00012d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D56 10904 bytes
SHA-256: e9b02356b2d10aa1c74c29a056c7b348a9c38941853d8965c2d72d7033fde230
font_02_sfnt_off00014665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E76 16392 bytes
SHA-256: ef0cc6e7d46b82340c5d611abc6d5ef62dfb31a25a64485243244449d36d16ea

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