Malicious PDF — malware analysis report

Static analysis result for SHA-256 047f14d914c2dd68…

MALICIOUS

PDF

87.2 KB Created: 2021-09-07 05:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 116f88441eded2eeba91b1ae3e7af94b SHA-1: a0a33b88fa3cc5e72a81e3fcbdf8b2ae611aa0ff SHA-256: 047f14d914c2dd68d7cee157ec2f4c0eb488de39bc82a4cf8ac8e8418f805533
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160833cc10ba28---86805030442.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/66dd3b287f7ae7aedf5d86345697e01a/nijitusozofuwakozogarigu.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161368c373b409---dumofarifazav.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e90d76c8ac---29675482950.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/bukebaxijagaj.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b77c6bd072---nobiwetanaraf.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/62594230918.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160f650a0d5d96---31660421975.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878f15a7343---sujapexap.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/jelugapudarefesemuwibuvu.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b3ad4af97482cc8268f4ccba234c6120/dovamobuki.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48af979e17---zawedolumuguniz.pdfIn PDF document text
    • http://ailizia.com/userfiles/bopejubekerupivivalavanib.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a5c513502---93409597987.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/80872287603.pdfIn PDF document text
    • http://skncn.com/u/files/kenuze.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/80824768530.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nv30m3splf4hv725iet5dqonb7/89840171437.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/k3k6auarqfnbjcjg7kliefs362/mazatunive.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/59651830665.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f193a594---kipipezipesigijew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=constructive+dismissal+south+africa+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001055c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055C 18748 bytes
SHA-256: d3d67a469d0eaa45f6ae59c12243e2eb7e809574eb318d3310bf1ef9253d0228
font_02_sfnt_off00013569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13569 11084 bytes
SHA-256: 5a6f9c9fbbdbc17fcc9a956307989a5dd3e4046254ffdee62733ff0f2d9383c1

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