Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d08c2edff4a8a9…

MALICIOUS

PDF

77.2 KB Created: 2021-06-27 01:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b37ffb0fe99b734b032c3365d6180bfd SHA-1: 9325f4bca573688c901d3702c9817e4f1bb9c0dc SHA-256: a2d08c2edff4a8a95fcba9246344229c6ad2466fc5bc4be3aeb4b813a46dd9ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4517cae928---dafodobelixolutowafivaxel.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/c3066a7fe5f487bd7d9493613678cb45/32432496146.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bddd3ea5bf2---vewanave.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7c4b3e55c5fddd0ea1eb8a1c0c9e424c/kesurolomunuleka.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/p0br83k4tr2kjkjchcb7srbc1v/51300871006.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c830d71492791b3857363ad93434d5aa/misulojado.pdfIn PDF document text
    • https://businesslife.com/content/file/54014750850.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/7d5484f4a0f6af26fd05874f6d0c5ebc/vomexidax.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/46011d03906d3b12b8c6bf11d74d34e0/230744124.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4bbcca76c41d55bb7fcc605b046f209f/43535977891.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/56030154227.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/fepofol.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ac12b8ba9---82455259256.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609476d32170b---fidosovararaza.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607735d8b2983---tesilukevazuxolison.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/tovijulixovonalurun.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/vugafirirejemokisarofad.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/pibefusimefegawasubul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=where+to+watch+dragon+ball+super+broly+for+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE6 17472 bytes
SHA-256: e6536aff2289f75e16fcc9ec8f20fb06410669637a153858345b8d89401f19a3
font_01_sfnt_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 11240 bytes
SHA-256: b7e3b9f4fa9f632a25e4cdd8537783f148c4cad7c5f26f41d297b50d2b4b6b37
font_02_sfnt_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832
font_03_sfnt_off00010d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.