Malicious PDF — malware analysis report

Static analysis result for SHA-256 7543a97b7a396d98…

MALICIOUS

PDF

91.5 KB Created: 2021-07-13 12:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 30c6f96cd96e28e8b8786a31f09275b8 SHA-1: d51a878f1b32056839799cc139a72403dc2c7696 SHA-256: 7543a97b7a396d98891eef49d7e16d743e3f7de30f40e40ea735c38d7a1bb2ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6495

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=indonesia+bus+simulator+download+for+pc PDF link annotation
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/7cf9413338f8e3ca68f4443f61e2a4d0/58435176005.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/gutulepusivubobig.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac797a880---tarojipojivazigozaze.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789813ba55b---33260257184.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/29960214815.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/79665138551.pdfIn PDF document text
    • https://abeess.com/userfiles/file/24383813532.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b847dbea---peloboka.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/202b5c92b489006967429991a5de460a/juzirovililometexuwatet.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b7b153e9501456904c694df598b19226/gafawiziruzinirapedikejol.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///rixuru.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/nimojaporonatafamawafomo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/4cf94fe48d40d2237a0e975560f988f0/xitubadi.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106051648106450.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/tisaxuderenofujukatino.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9e7d47272---pinabudazijufuna.pdfIn PDF document text
    • http://abwrva.com/uploads/files/fovukixufon.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/75ac62bf07136585248ff0ad90ad0c22/jawetafosiwip.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/bk2vj7ta3vn7a1rba4moe81gv5/83332241259.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/dba6c17311017f66802116febce1d067/pelekijuvibejepadaw.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/33087190019.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/71828647347.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/kovugewuwadizizokojo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000fec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC4 23384 bytes
SHA-256: 4c8821f1e11be23fbc79f973a7615f775efab2f3efb02c50b64319ad67e46b03
font_02_sfnt_off00013649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13649 11060 bytes
SHA-256: d3f31533ebd4c11e1443ab706dcafeb186aa1a19657bd35b06b150f9a41433c3
font_03_sfnt_off00014fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD9 2268 bytes
SHA-256: e3ef3ccb829de6e1e185735611acd1e01a9e24b45ee281763200478f79589475
font_04_sfnt_off000159e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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