Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8952e8bb51e2562…

MALICIOUS

PDF

78.9 KB Created: 2021-09-08 11:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b45d1e3e38c27b6cf9915b1d7a419acc SHA-1: 976db4de679fa2dc5bd37abc6bee732d231cb6a0 SHA-256: e8952e8bb51e2562fe40513b6aea107241acfcb1cf278282718ad338c3887ace
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites. Some of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4726

Heuristics 5

  • 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
  • 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://mariangelesorrico.com/galeria/files/74767896030.pdf In PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6947a45769bff94196eebf68fecfd7c1/letaku.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/zebefubufusu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d36865a2330---fiwemuxezuxupegipedurixen.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/56971475485.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b4747ff5b---51942639553.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/72058259813.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/44502523331.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2761f6096c2f8ebc9e5abc1997b0cba0/dusurajewomerul.pdfIn PDF document text
    • http://sciattella.net/images/file/39289116282.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082066175418---73784954562.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/wuxozefafujivawogojif.pdfIn PDF document text
    • https://drlanda.hu/user/file/70472162802.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f316dbe80f203fcc6bae530a7cf96ccb/88613513305.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d23f455fafaa6669255ec488eea265a2/bewugovutimekisivuvukuli.pdfIn PDF document text
    • http://leguido.net/files/jezapafunapafofedez.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/jebarelisiwe.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bdba6f55a---sejonekur.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/29282296470.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/vawopotidoluferawomejum.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/28119641855.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba3f09eb5b---64642066934.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8436d067c03f6083373dd272f7237620/11164366951.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d706da7f47f---99754657494.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/pewabilawuvuxevi.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/mizowetanopalanobowowarul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=computer+science+an+overview+12th+edition+brookshear+pdfPDF link annotation
    • https://lapdonline.org/file/11945807816.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 17076 bytes
SHA-256: 59a39107e118cf5cb74905cd6d7acced6158bec4d6209bca127d4f8502e1219d
font_02_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 11528 bytes
SHA-256: 7bd07060d5ff301da0ad61b861a49f6b0f43a5a24ba0185b1e0420c63031d02d

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