Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dc046d06c5bc4d…

MALICIOUS

PDF

90.5 KB Created: 2021-08-16 00:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f03fb018adcd3ff6ee35e6dc06fb49bd SHA-1: b0ce3a9c2f832970af87e73fd2064e9b40f590eb SHA-256: 51dc046d06c5bc4d72a942ad4660f2e7e26589c8a563d9fad55f24e6332133a4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS upload storage. The primary purpose appears to be directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://hitecds.com/userfiles/file/sogokasubokodagejobum.pdf In PDF document text
    • https://thietbidiensino.vn/media/ftp/file/69074184117.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/3506195342.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d3bd4b941---23685020084.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608e86ecdc674---xotalulagevose.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/jezadowetusamev.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/87955124857.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/zotufibajumedodawedunaz.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b3440ef8a---35461111341.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/99942799834.pdfIn PDF document text
    • https://sce.tw/uploads/files/60c1903f17b09.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/gukurebalisobir.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/xinevemamupafokulu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b0c00f051---83949756850.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/en2oefv0fvk6q4flad910dv71p/83747954954.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/phhb98qr89cnvmc5mknvuukqf4/43581515405.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/4424274442.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/60570223128.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/19743022953.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/nejujuveziduxuvoj.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/norado.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/0acdd688fecc7b998ce8d4af1cc27823/26907271145.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/46197297840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=nombres+de+las+placas+tect%C3%B3nicas+del+mundoPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/dubaxinewokopuz.pdfIn PDF document text
    • 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_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 11028 bytes
SHA-256: 1ae7d4b831beedccd1d4cfef0f1271dc23e9f9a926405995448c5cc6155cc040
font_01_sfnt_off00010e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 19428 bytes
SHA-256: 88c22c1a04bd8a8eefd832e01d1ad6260848a7ad10c93881697bb7b3c426e561
font_02_sfnt_off0001411e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.