Malicious PDF — malware analysis report

Static analysis result for SHA-256 322d052c3aa58c14…

MALICIOUS

PDF

74.0 KB Created: 2021-09-15 16:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6609c1df87d8574f9f125fbce10578c1 SHA-1: 69f9f85d9f24c431b74c3723e74c3611b5691868 SHA-256: 322d052c3aa58c14f8f2177e65f50f8f672066910d1899af639c981f9c21449b
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to external resources. Several heuristics indicate that these links are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to lure users to download potentially unwanted or malicious software. The presence of a `utm_term_redirector` parameter further supports the phishing or scam-like nature of these links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://modaxch.com/userfiles/files/sokumoxaxerexi.pdf In PDF document text
    • https://hirurgija.me/files/63826473657.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/11231793967.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/57517976217.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161374d0221664---98928459069.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/vitiwige.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340ba941b4d---9472714304.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef823a5811---jefamedelelabubetaki.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/xawekek.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613318799482a---52280563920.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/nodoferewugibune.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/pozujekoxajujinobenuwope.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/kutedinobiratezikulu.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/xulugibi.pdfIn PDF document text
    • https://12waktu.com/contents/files/webegumukafe.pdfIn PDF document text
    • https://pr-dienst.ch/file/wapefujitub.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/4551789920.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210908123624461.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/suruzegamoji.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/44305342302.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/12745085480.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141abb8ba84a---40821741022.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/89413864168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=soul+calibur+android+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C7 18064 bytes
SHA-256: 27a1aae37bcc09b7ca2b87ddb4e8b722cc3961670a772a0a5b479018d8e41547
font_01_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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