Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1e6a07721e5b50…

MALICIOUS

PDF

213.3 KB Created: 2021-06-29 00:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9d0388d7867956d01fe2da61e04409d3 SHA-1: e3d0b35d96b9332498d4448d2e25e1220c2d2204 SHA-256: 1e1e6a07721e5b500921648e595604baeb3f5955c4d089b6777b780886886bf5
166 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7752

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f78b0c789f---30345185900.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae53005ed---lojume.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/nekabadasovem.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/kte73ptseuk4152udh4n1n0bpd/tabudovuse.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/da1f69c928b35e89b7fb77c0b901ab36/kajobisim.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abda20b403b---pimuzubogadupez.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/kiwixo.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/72447252746.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/4rdsk1fn6r27oq0bbvcfumgs25/81151583602.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609005151f382---tumun.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bf7d5b76c---wixipobazujezadeva.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ecb0b84de---81605968186.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/sisajodesonexewexerela.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zazekesotu.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160729afa0482c---ketexazakowuboruxilanij.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ecb2a6e37e8e504ecbbd3601dff47860/wujisakuxosanepibibegag.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e5f5e1692---12252127689.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d48a56113c---36466232364.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/bidaf.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606d5e898faed---sofuxanamasirejerewi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1929df415d24b04a4c2980706e068305/42508128395.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc18c3c61---71821406860.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160945ab7a865f---xulavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=put+off+for+another+dayPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001f1c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F1C5 40788 bytes
SHA-256: 09cfdee20c92d19e290c138fb2519c459f83eaceea16384875780639f9c4dd23
font_01_sfnt_off00023cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CF3 41176 bytes
SHA-256: 68f4beb3e81574a00fd72f47d8d2606ce3c0da311571760cb7d7fd96fe7275f6
font_02_sfnt_off00029305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29305 50288 bytes
SHA-256: 7b48a60e940e61c3e1ef1ab3840d6ea2a0daa555e6e0c94aed3ebe2d81165486
font_03_sfnt_off00031778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31778 10360 bytes
SHA-256: ba410888addfd23f042139e5dcdc3d29ea63fc37e3e8283abb45fc3bc727da4e
font_04_sfnt_off00032ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1