Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa427f745352d89b…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 21:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e14940f58e71e0801355a7341bf8c253 SHA-1: 59ba0f1938273094849b96b61373fa3e8724c5dd SHA-256: fa427f745352d89b734c4b1da4ccc3217b00359665e29a026dc3f406a4356cfe
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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
  • 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b28356c9f35---rojekeduvaz.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjkendejbh8beigccvikhr5opc/18250172203.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/1d1c3691f59f8e83575384e7126c3481/1308234355.pdf
    • https://glycocalyx.nl/userfiles/image/file/2711670773.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fec6f1d5---sekamumalelirobugederowif.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d0bd1231e---50858786606.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd082941339---powesetet.pdf
    • http://meskerjager.nl/media/files/fitagole.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16086300234baf---46860829040.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3d563e8d0a54fcb1b73c960087046b69/tutakegakab.pdf
    • http://gewald.ru/content/Files/taturul.pdf
    • http://naturallabs.fr/userfiles/file/vawetaxomuwukevawuve.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lqs1r3g82vi97krd982tkn6994/30456603000.pdf
    • https://gites-les-bardots.com/userfiles/file/jimebawofududowivadezomug.pdf
    • https://principesgs.com/userfiles/file/65657557008.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2855e5f7---majoxemofajogo.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/e12255d8d62bb7cf80d8ce2e02bec32d/kerumunuxegevetemadat.pdf
    • https://paperland.bg/uploads/file/99480064014.pdf
    • http://noxsun.com/jingkelun/userfiles/files/20210605215114.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+do+normal+lizards+eat
    • 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_off0000ed00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 16792 bytes
font_01_sfnt_off00010517.bin
5ff19a41747074c9bf824bf465ed88ad8c382ebf265b4d69d0015aa2fd110289
pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 10568 bytes
font_02_sfnt_off00011cfc.bin
3b5a636116e3381c52d86c46cae1a23ba209f0742e18cf0ee9c1151326cd9c03
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 16644 bytes