Malicious PDF — malware analysis report

Static analysis result for SHA-256 9118fa2a77a92521…

MALICIOUS

PDF

90.3 KB Created: 2021-06-18 00:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e7fd8b735e81752dd8b2fffaecee7d4 SHA-1: b47f4d126d4d2a7b62c4d450dfa5f653c6246d69 SHA-256: 9118fa2a77a92521175a329ce4cd6bccd7b728cda659c64ced998000c554f855
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised WordPress sites and potentially disposable hosting domains, disguised with a lure for 'Inshot windows 7'. The embedded URLs suggest an attempt to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/42ebf47b2491a0ccdfdbab3aec5a5afa/gosapus.pdf
    • https://bisnismedsos.com/userfiles/file/puvegaxazixo.pdf
    • http://aklond.com/UploadFilesfile/%5C/2021042922015985.pdf
    • https://careersourceokaloosawalton.com/files/public/wuzoza.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/vofubujifukozozas.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/8un61ise0jtibnq7p6l6tnk1d5/31490539092.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/b7ad8441e7dbd5577c80dead613e4938/jokiwamed.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3cf9cbbe0---xetoguwobe.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/58229663612.pdf
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/34946957320.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49933335c---31416855127.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607556f82f653---61171849500.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072faa6a1fc0---raxenetovisezovif.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/37ccd3107a15cc555e5e325649fe888f/3830652129.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e38d87df4---6045582782.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c14c7bd4---32859888884.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc09861066---liniwosogutufalarewak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=inshot+windows+7
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e476.bin
ee6f16e0c8fbbdb31aff1aaf3ce7e76a5fe775949f4c4bd5e090cddb5182f6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 6676 bytes
font_01_sfnt_off0000f54e.bin
eaf973511cbd0a97204938b68a8475ab8402f3d80692b51e5367c557a5a235de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 4684 bytes
font_02_sfnt_off00010550.bin
a9e41f3323e5c9a355dd85e9bd19fcd9f584dab5136443e820d0dcfe6ae53d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 7296 bytes
font_03_sfnt_off00011e78.bin
6282da2f91fd4e8c64dcab1a35c44d084ce1f0337c381f294bfef6a42aad44f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 11476 bytes
font_04_sfnt_off0001457a.bin
b5fbaaa4af9b36882f9d831a885ef238a37545ab26d417bac7d8f56cddfd7376
pdf-font-stream PDF embedded font (sfnt) at offset 0x1457A 16328 bytes