Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20067fa63cee0b6…

MALICIOUS

PDF

89.8 KB Created: 2021-07-15 12:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e09870a40d2a97bcd778d07586b26665 SHA-1: bd9017f5457f801d241bfa6494315d7b47832e94 SHA-256: d20067fa63cee0b6e883f8c7947d4252e38135a74cefac2652742b5719cfef1b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://dansungsala.com/uploads/files/lawakumuninewelesedaleg.pdf In PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/zenotovetapiz.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160756400f200e---36433236771.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/83797257994.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a329f4319c4---3407327952.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/37351728063.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3bca7aade---88699551225.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/lewexebosawoxitikuloduze.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1878b5cb8---tojimomedo.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/1fc9745e3294c4a5e30d93b1e7967695/gulewekojubavuf.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/423f187c0b6b80f43aa17fac527b033b/8778931128.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/87544020285.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/40708627725.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f475bec4c---37793143885.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/b4ndf82tqq8dpdkouv7sdnskg9/73863994713.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c74ad7c7075---zorizo.pdfIn PDF document text
    • http://moneymaker-gold.de/files/53608239988.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090f863e9739---kuzenikepuliwab.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/59dphcc5gtn2bduer6n5rgvavs/poluvolipogelatomulebizok.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/losegogosote.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/zubovu.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/38501935612.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092aab256d50---vamudatojuriwa.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/45196041498.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/rosof.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/58850821924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=fallout+3+how+to+start+the+pittPDF 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_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 10580 bytes
SHA-256: c4b941c18fc1ef572cf64e2001adac210f2ff9977bf0f1418808878cc81f2b27
font_01_sfnt_off00011482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11482 16760 bytes
SHA-256: fa5099e2419b90e82a3382f608524f3ff2acb10d47889eb60a9f7b0840f84e58
font_02_sfnt_off0001400e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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