Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd0aa9df7ab36c5…

MALICIOUS

PDF

73.4 KB Created: 2021-09-05 13:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4d5fe7d28f4c2e95c6824cfc7df880a4 SHA-1: e2fe9762b99d286c79344236f2ea98cc25835c07 SHA-256: 3bd0aa9df7ab36c50e00c01bec71529ac00a41e09332664833af5959f294b568
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites, fitting the pattern of a link farm used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607072b574512---zolerifawatupabiwiluke.pdf In PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/bewalejorode.pdfIn PDF document text
    • https://termocasasrl.com/file/mixudixediwozetajoravokam.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/dukazuterobetixorulisi.pdfIn PDF document text
    • https://werbemittelag.chupload/file/27167915000.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/bifovajibobezuwumoxasogen.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/offtdpmh1l7g2f7nr9rqvl10h7/tiguj.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f434bc24b0---kituranizafud.pdfIn PDF document text
    • http://technocom.pl/editor/file/lovevalone.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3abc48b6be---57874200159.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/84a1ffa9ae6dc37a43b70851f357d839/roregonovufesuve.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/sodixulifewo.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/30091199021.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/vga68pqgadber4h4s6tamvvq70/68535606162.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/tamukitunefalazubexo.pdfIn PDF document text
    • http://24cvety.ru/upload/files/56399808928.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/jc3bga7h0dei00145ccnvugtup/meredexux.pdfIn PDF document text
    • https://forssh.com/userfiles/file/88192273272.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b4b7fa5aa7c5ef6d61d968528b100def/33358630600.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866830a3888---tujodojuj.pdfIn PDF document text
    • http://agro-partner.com/Image/files/21285132802.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b3c3c5289ca8565fe5846c4a9ecc0c0f/wuwizojitexutuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sequence+and+series+word+problems+pdfPDF 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_off0000b9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20B 17232 bytes
SHA-256: bd1876e56e4eb0bc961948c263a43730adfe1c64d7a03bf101afd66ec2b7f1cc
font_02_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 11232 bytes
SHA-256: d37fe26e9e9764ffabe517066da386b23d23fe77d39ec6fe171f24e9028d2d52

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