Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e705e21a44986ee…

MALICIOUS

PDF

76.1 KB Created: 2021-06-23 12:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ba0ba25b5bb1e3c51382a1e8a128d942 SHA-1: df48990eeb89707bd9a4fcdd37ee83c379bb4111 SHA-256: 9e705e21a44986ee3fbaf6c3cdfdc55742423386ad0587923a1a16396252ac1a
176 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links pointing to compromised websites, likely intended to host malicious payloads. The document body, though heavily garbled, suggests a lure related to converting PDF to Word for free. The presence of malformed streams and ML classifier detections indicate malicious intent, likely to deliver a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160736a6c31ff0---39417626183.pdf In PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc5ca569e9---vuvugafuzewo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/483b8ac4c3cfcd7e3a3a8ba0bfd72279/37385840637.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6kqqiu6hrgeiv5ucfl68br4t2b/luxagirogumuzizob.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f5a5344ab---21097362653.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/28ffe2d3659844ca09b1b7b3bfd45dd6/fojisodanirokivusubenev.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/40360288609.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc89490ba---10782847231.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8df0a0ed86---10585321902.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ijpdm52u7p5fcvjba4gpsv1lb1/labibewirel.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/589830621e2c65d5fac89af80a60995f/renomarovowudubizujewine.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/36194713566.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/josakatinegamegikaxax.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/e5c9278a0cfa055dfeed86c85f1b5ac6/kawurifogevu.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210526171958.pdfIn PDF document text
    • https://schmitz.cz/res/file/tenanen.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5beddd541---pelejironaxipija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=trasformare+un+pdf+in+word+gratisPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000da9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA9A 3584 bytes
SHA-256: 9b5863fb2b0a051e2f77b7575383297dc33e9c543130a65407be3e4d5a9945d1
font_01_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5252 bytes
SHA-256: 4e74bf710439bdd604b2e24df17f88248fc4e7c55586ad5de286813a84dade1d
font_02_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 13864 bytes
SHA-256: 54f8076f255607ab6e13355feb7f34c4452fe78f894d7f5fc92f4aed3f6a1a9d
font_03_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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