Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbc16ce63b95d3d…

MALICIOUS

PDF

83.1 KB Created: 2021-07-13 04:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f54bb80fe9c155beccd3c98e05933d3a SHA-1: 72333441437cb45b8d3fd223da9fd0b7d8c8588a SHA-256: 9cbc16ce63b95d3dcb8b69c87488c8ba84ed730bef86e200b93d3fc666371f0f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The ClamAV detection and the presence of these link farms strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the structure indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3290

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=maed+educational+management PDF link annotation
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/043ace146fa97df05c10c07f791e1477/mopekegamimikogufipux.pdfIn PDF document text
    • http://svx.su/ffile/file/62152002285.pdfIn PDF document text
    • http://brlairport.com/images/file/gigawalazakiluxoz.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160718665bda34---kikok.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b74a3ff6c---10868085034.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/3e591a3bc7ad5cbfbae51719d997ea49/linasukugesukadivarezu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/0algp309q96dk47ne0p9mo5ema/bamuzinelajivawabakoxoxub.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/01c606b7703de92116427daeff089b4b/78895180258.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/fb1b846b5ab0324215c2643034314169/86159877955.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/fusetosodipum.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7d70bdbe---retudavaw.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b71f3be12ca---61045748020.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/3gtft71b8tqmgcfv9pcrf9joe1/72531227314.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160734ce73bb71---43525673725.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1dee50d1---gufegubofuxuziruwefow.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/12631978998.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f34e5a05d3---39475931820.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d56758209ef---16813253980.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/fokebepoxuberikef.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2e28bf711---venot.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/473009562.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe8fb93fc---92928652792.pdfIn 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 10536 bytes
SHA-256: 7d23c8afb85a667fedf79d01dd8c76839d06c1907f3796aad416c9bf77384823
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9C 17504 bytes
SHA-256: becb039f3d9a9d26a077c8564f49c6e52ec3e01343db01e6f149152a155dbfc5

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