Malicious PDF — malware analysis report

Static analysis result for SHA-256 596d84eb37f5847b…

MALICIOUS

PDF

391.4 KB Created: 2021-07-04 15:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82ca30e8afd756bfd6c480b305b3b4d2 SHA-1: b28110d428a1ae9c85b8479b00d2c6733e63a616 SHA-256: 596d84eb37f5847ba13c038683d10814a8a3f60fcff621ad34b80b70d9e57178
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The presence of a 'Password-protected archive lure' heuristic suggests the document is designed to trick users into opening a password-protected file, likely containing a secondary payload. Multiple URLs hosted on compromised CMS upload directories further support the distribution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 http://avonsteel.com/UserFiles/file/90682371860.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/7a72377c5d0c4489f035bb4d9442ab63/xagub.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096262ec928e---24331809828.pdf
    • https://asset-books.com/userfiles/file/safija.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/k50hla66okc4hnma90b90gvee0/namufiluvodajufoveliba.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb673f98e---23035761835.pdf
    • https://vinacomvietnam.vn/uploads/news_file/94902221005.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90dcddc35---lazemibegofimebinane.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b960e5125fa---26447510422.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f2a9dd70002f29fabfbafd3ac3741fd0/dizutepotozu.pdf
    • http://anandtouristcorporation.com/uploads/89291240669.pdf
    • http://kingnature.ru/files/files/tideg.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/qvu51bqu9dp7nlkr26l6f1b5bs/lokapabogawonomigizinu.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/el2ib6vhf23o32g4q39om41m1u/fovegijadolorasuwexinem.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5a77b5a11c54b1e918dacdb9d8ab0c80/17656742812.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/0372611d9db75b10aeffc370c264530c/nupunibowakoxivilud.pdf
    • http://grimastone.ru/files/lojaniledemasubofalorata.pdf
    • https://antae.be/app/webroot/uploads/file/zitugotemetigutegidedelul.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/a9a57aa49923f028aba8c7e779760ceb/74071692079.pdf
    • https://orrizon.ru/images/file/93610574362.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776f5a8bff---84639810565.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcefcd09a---46993449278.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0800723f960d66187289132e1972e190/23941346335.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/fa55794adecec2a6d2449522bfc2a066/1870915567.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/c6fdfa3e5ef3623a14a2eb7ff036efeb/13555592276.pdf
    • https://tenekedjieva.com/uploads/file/balogujamotinonofigojaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=adventures+in+middle+earth+rohan+region+guide+pdf
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005abc2.bin
1d6e14e6d3d6030981f101cef644e7a76f63f73a909e7943687728d1ab653e22
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC2 11092 bytes
font_01_sfnt_off0005c544.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C544 16792 bytes
font_02_sfnt_off0005dd56.bin
cb30295b566ae8df46bbe758f8e497480d553ea01cc153105b0d5a004ab7808a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD56 19124 bytes