Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f116e5e70027113…

MALICIOUS

PDF

96.7 KB Created: 2021-08-18 13:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25814531ddd165caf0a3995a7c747672 SHA-1: 2041b4423e137d66a8e94035f3eeabfbf25ea412 SHA-256: 5f116e5e7002711383f14f84a80f5a9c7dbca928ea27724967a04c697d22b3cd
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external PDF files hosted on compromised websites, indicating it's part of a phishing or malware distribution scheme. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests the document's purpose is to trick the user into downloading a password-protected archive, likely containing a malicious payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607edbc33e78b---38253192861.pdf
    • https://free-spirit-city.eu/uploads/wysiwyg/files/tanajuge.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/v0nfc7foof24o4002cd1qouia2/gakoxojelufobozorimafe.pdf
    • http://bethelcommunityone.com/clients/880032/File/rosawivawirivezaje.pdf
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/zotadizigunowagegu.pdf
    • http://emeat.ru/var/files/67669924816.pdf
    • https://canionglobal.com/FCKeditor/file/29287663755.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/a26bo3ikle79p87osev60k6l2u/feginomejelilezamad.pdf
    • https://clubesolbra.com/uploads/files/20034141176.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/63552a02aea583604f8772a8504bb0ad/rapilovilaxomani.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2680ab61---97408596901.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/mvf100d9c4m652cvkhfovvg0g4/xuvejutiwirudi.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4e9ed43a1---xeribol.pdf
    • https://moraure.net/js/ckfinder/userfiles/files/sazikakel.pdf
    • https://cgeminfos.ma/upload/file/88415528173.pdf
    • http://tjjjsh.com/uploads/files/61069312854.pdf
    • https://aprilboya.com/userfiles/file/sefujefojijanodu.pdf
    • http://vpecargo.com/userfiles/file/dezonurup.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/10835393390.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9cb5ee8e2d55ec2440b892ae34325caa/xibumuwotupagodokiwifotiv.pdf
    • http://dui-antidote.net/images/userfiles/file/sajato.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689220a84b---ludekelivi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=descargar+adobe+audition+3.0+gratis+en+espa%C3%B1ol+completo+con+crack
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 16792 bytes
font_01_sfnt_off000103c3.bin
36a47794484d9a09d99f86cf0225e29e108b70403e9632f35e4c9252d8399ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 11756 bytes
font_02_sfnt_off00011f2b.bin
b43c22315ca2c17f8233e4e0a014ae2bb38237fd89bb3d47fc34c812f14ac615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 3532 bytes
font_03_sfnt_off00012caa.bin
090c82b464206e93b806c757240cafbc216c9eb75937be9cfe96cb7fdfd17613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAA 18048 bytes
font_04_sfnt_off00015b07.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B07 16092 bytes

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