Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bedfab15254d76…

MALICIOUS

PDF

83.6 KB Created: 2021-07-08 02:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27c6e5df70a7c9655397f16ef890a249 SHA-1: ba871d55e0d319475aca75a465f123e198d139ee SHA-256: e4bedfab15254d768c5ecfd85eb522e2d143095d10d8fac57e7149a030ca31b1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users. The presence of a raw IP address in one of the URIs further indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's used for phishing or distributing further malware, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://wmhsclassof1977.com/clients/34196/File/xijaduwodef.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dfe59e4da---xefonodativemigigurabiva.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086e35f28b35---88467407221.pdf
    • http://abacusnancy.com/userfiles/file/73515430037.pdf
    • http://mawaevents.com/uploads/file/meverunetapuwowuzo.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa17a00dc8---2923810441.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92f891bdd7---zutajekapotiwutejata.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cd79b39f92b---95962107037.pdf
    • https://uniontend.com/userfiles/files/84079951784.pdf
    • https://addsfly.com/userfiles/file/gegumirexiwuw.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/82911105406.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/73ab4a93d7967e7ff36a72d03cb74279/bovujazekoliwixu.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5d621706c---60022215947.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078539da98ca---1345290558.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2108442a80da7de419aa06dff59dbdfc/77678028576.pdf
    • https://noticky.net/akce/fotky/file/dobexofuxar.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ef4e3b110---zibasumuzezegenag.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63870cde36---sovanexigobutibinukasap.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e77cdcb82e---88216448478.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/fefopemepapufojibotelup.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6cfed8b6c---60312326070.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49bfa02233---33920103643.pdf
    • http://escuelasfutbol8.com/docs/files/ropowajevefijig.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c9ad7327---wewufojopes.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=city+of+lost+souls+cassandra+clare+pdf+free+download
    • 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_off0000e3b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 16792 bytes
font_01_sfnt_off0000fbc2.bin
2c71709913ed7ef9c07ed428c6dbd9c698dcbf8b5ce799bad7e8da5c2aa11446
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 16888 bytes
font_02_sfnt_off00012741.bin
cab1dbcea92a985c5ecfe0e4f70d7633cefab4213305641b18bdaf0c9cb26169
pdf-font-stream PDF embedded font (sfnt) at offset 0x12741 10944 bytes