Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce6b4d10d9b1744…

MALICIOUS

PDF

78.3 KB Created: 2021-09-17 04:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c361ca25ae0d6424b5808e5ecde91d58 SHA-1: d427a9dfe7abca3f4842866ef803b43af0095990 SHA-256: 7ce6b4d10d9b1744fe46c7f35291916aa429d4c3f7fe6eeca4996d7108ab82b8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is a common technique for obfuscating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://apart1day.ru/file/79251484342.pdf In PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/depunarepi.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/wekogatevovibugobonewap.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/fekalosiwefulibobidezi.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/86856656192.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/2e47e074494ef200a4fd99da18a6f35a/dawudozatarurojosewelovi.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109161026481043.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/54350960781.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/70318418869.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/jujigu.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/79130285196.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/bivetularoluburag.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/59010431198.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/saferatujutukudo.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/77604507531.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/denubigiwuwenoz.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/daximuxofu.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/15123552436.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/49878754219.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/8927588000.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/pejafutakudoliwoni.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/147cffo5afb0rasosi3r46n52f/83197122052.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/dd16ccf6fb46a5c02f89f7bc2a99d2c6/34176686646.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/19863936917.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/25138742896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tinycam+pro+apk+downloadPDF 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_off0000d037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 10532 bytes
SHA-256: 697e490e47a659189af1b7d9a0e5f5afccc7a187d84b5695bde99d655bb278d9
font_01_sfnt_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 16748 bytes
SHA-256: c019615d0d4c1137aa926bf29ce75ef50dd54985c9d37167816dfcbc1709f4a9

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