Malicious PDF — malware analysis report

Static analysis result for SHA-256 e909cb9aa6f29d39…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 13:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e895bb1e1af4700910528216f4136ac2 SHA-1: 393f74eb7b46124dd8b1723b93dfec362907f105 SHA-256: e909cb9aa6f29d39e2f7cec383a4e22b482c18beb3344a67f84ac4d4fd9cb570
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://greenearthgardens.org/userfiles/76538848504.pdf In PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/80180318290.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16109d551514b0---13862528897.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e031f6f7---lanakuworovovudibokajuno.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///gobagomo.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/4832134785.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/pilabud.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/aapidpkt5m39c68s7ndpogcpej/togakitaxili.pdfIn PDF document text
    • https://icbacademy.com/upload/files/51732150226.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161192ec35986e---sodawo.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f45221546---mogufowoxire.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/91480934981.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/88af2bd0a7b1f74bad71cafaac66a5b1/8631155456.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0vk1oq51cjo5gikp44gih9rg1/97782765176.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/degikasesunuxilu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/80a5833f2ff5a09ed55a714ef6bb479b/zuzunijegavawide.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3bbf74295---puloginizidaxafudugit.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/aa0093ff3e2d5f38806bdd436a97516a/selez.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/030704021203.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/68576532513.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/82495508709.pdfIn PDF document text
    • https://theipbuzz.com/images/file/xexemek.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/65736008035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=download+al+quran+dan+terjemahan+gratis+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B0 11408 bytes
SHA-256: 1697a5b111eb537480bac4af80dcf8251f6aca8ec8a6bdb34d6c878a00b42517
font_01_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 16640 bytes
SHA-256: 605c690ecade9b2c5309107a4a90e15f0cd2a22aa67f7a6c48f741138b7bfdb5