Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7c2fc98eacabac…

MALICIOUS

PDF

161.8 KB Created: 2021-08-06 05:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 64e9bb24b54d9a087c00c73c6d66e90f SHA-1: 48c6ea682e242e8f571769a9a922d36afce69e6b SHA-256: ac7c2fc98eacabac7293860d6c08e052eace2df7d69bb56316fb8cadd8179dbf
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and appears to be non-readable content, further supporting the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://patroha.hu/file/80280701858.pdf In PDF document text
    • http://giaodantanthaison.com/Images_upload/files/539500253.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210709_7BE89E5264E4D975.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3795aa568b---zovej.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9aca9236b1181a16a2fa0ad54c1756f/mudurasipodelev.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d582ec6506---muviwizidiwevorizag.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/bofosajodiwuripigomidutib.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/ponopuporaka.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/7461503cc508a25a82b0269a1eaee9e0/49991430554.pdfIn PDF document text
    • http://leguido.net/files/wudaxorulanijosivikur.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa11e1644---21503697489.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8023be9fd6---44819117764.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a139e66c56091444f65fd585abec235d/88945738539.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/53289083173.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/82322367690.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/12607184610.pdfIn PDF document text
    • http://w-mill.jp/images/file/76930073994.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/wilotu.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/mamokirabo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989bb223fc9.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26560a2c59---40435167656.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/kativ.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/fipazixebunolujekigenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=repaso+del+capitulo+4a-8+crossword+answersPDF 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_off0002134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2134A 20084 bytes
SHA-256: 96199d0b609ac31df4fca62e4d9daa9d40cce4858fbdf4ce3e5d94c8d73968aa
font_01_sfnt_off0002470d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2470D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F24 11060 bytes
SHA-256: 6aaabe228171006f4857c27ba5dde57a41709901d5b55a4c3de79f195b02a4e6

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