Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b663e7ada92563a…

MALICIOUS

PDF

73.4 KB Created: 2021-09-07 16:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 71b96f9a5dd1fa4df2d4a6c8b57dd2a5 SHA-1: c09c7f4f8941000437ab523f274b913aa99273bb SHA-256: 9b663e7ada92563a6e05136b6a541033c5e0b410646274b3c85fe2727aa2fbc6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised CMS uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine rankings or distribute content. No scripts were extracted, but the presence of numerous external URIs and the link farm structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5832

Heuristics 4

  • 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 https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5795672ec3---87832999205.pdf In PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/b79ef16af466fe2ec7491ff1506c0408/kulijuvizalap.pdfIn PDF document text
    • https://7gking.tw/upload/files/vubad.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/lijilafiluxalatiratexog.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74f0d4e769---55859016086.pdfIn PDF document text
    • http://goneviaggi.com/themes/userfiles//files/valug.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb82de657b.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/66576703782.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/negago.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/fezimegasekawisiguzunix.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea0003331---99003928830.pdfIn PDF document text
    • http://yilip.net/userData/board/file/21433634443.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/bde0f850778c1bf56948c523766e9347/raxikolazosojeworoxumime.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/10890606668.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/7061000681.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4894776c---11149251869.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210525100030116.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/rexapujogizuzupina.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092081c49cc9---karegipokurozuf.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/c460d935c86d65d37bd4c104c476730e/loteja.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/29062806940.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/ae1aedb6a34f5a565882736a84aebce4/7220755161.pdfIn PDF document text
    • https://egca.fr/userfiles/file/pedobiruxori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cagliari+map+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 18008 bytes
SHA-256: d1dc918b219245bfec5fc2832598a09a69ca2af2a6d9d7c584eef94cde79146c
font_01_sfnt_off00010a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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