Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe9574346beb86b…

MALICIOUS

PDF

120.8 KB Created: 2021-06-11 19:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2f898b43bc4baa92cd76f880c0a3bcc SHA-1: 664ae34a40e846a9c1268b90e7b8633d74653fcd SHA-256: 8fe9574346beb86b519e2caf3c7ad98e82078f5042118d0b52cca4764f2b716e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://garglob.ru/uplcv?utm_term=shatta+wale+mi+a+evil PDF link annotation
    • http://muszempilla.com/files/file/26788592504.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed364de147---26816822783.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a8241642cb66f2fbf93643812a308f84/mosubapijiget.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c7c62e680---solikuvuwozobisonuzuz.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad14c52340---webetalodufi.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/2k6tha8g5nbnuqpsugnbu4nb69/mafokon.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b4177d5c0698a60a252167f6eba95040/pidikotove.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8a35686560385a07072cb57ee166f44a/joxexasase.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607151b761b6e---27026548244.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/kur4an55knkdqf3kvgt5fhlube/kojikebobonar.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/52875013047.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085de2a49cbf---tozatapepabidopimed.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8f12f98367d8d9e369a5b12a7f028338/15288926972.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa06ecec5---makevonubovajavizawe.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608826ab542b3---79530748669.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4c4a2243e---nedajudulikak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_002_off0000d382.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD382 61140 bytes
SHA-256: 9adc2c6f74d048dd474313ccdefe0c2589fe40344744fafb232055f3ad1e9e00
font_01_sfnt_off00018ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA7 4908 bytes
SHA-256: d7ed398bdf85ca1860e462f21ef932b4171cf05f59c9e9b86abb349ed4266613
font_02_sfnt_off00019d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D4C 10436 bytes
SHA-256: 5a4fef1a3414bd4983ceb4c1c2158960fc386ff06db4a511d50d0afceef3c7f1
font_03_sfnt_off0001c0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0C6 16160 bytes
SHA-256: 25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c

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