Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d29943f82f9689…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 22:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e23b4d2e9e25dee9902b5c25f4e69d3 SHA-1: 3762736bb3896d273d4d1bb846424d70e21c2ff6 SHA-256: 32d29943f82f9689accae338faa841549498445e7e6c71bf36e34606cfb6dc6c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The presence of numerous external URIs and link farm indicators strongly supports this attack pattern.

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 http://hoteldanang.com/uploads/images/files/gobovewimomagosefutuso.pdf In PDF document text
    • http://masterref.ru/editorfiles/file/nerekolevejepukutonog.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608459e586681---fagegigonutilunusonaf.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/reruw.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///rofijujigasefuze.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/825ef7fc273fadf7fad781ff1b2a7265/97856017191.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/dilelivolegodu.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/tabujubakesiwog.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a3ea150b9---kixos.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/77732116561.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/padefuzejig.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/5837181367.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/50273881218.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/natiwisasusuwagofixi.pdfIn PDF document text
    • https://menu2uplus.com/images/file/gorolosajemabuwupo.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/83567870727.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/fojaxezaworafoluxamisez.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/sk0c094e41kncej0i9f2l4t6fh/lisitifevezijasokevopo.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/79142958429.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13ed835ca---welekase.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/34b02753424d32c2f05401774cf78cf6/pupidifipugedoxo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4a910bdf8---48163115518.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/4b6d2cc298f24db67b70c2a9e57752e5/digewogifunezifazigaw.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202108301515143862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=speaking+activities+pdf+a1PDF 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_off0000d3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 17360 bytes
SHA-256: 40af06527582d8775073625b4ba672ec5120ebe809fe582438e4da1e12705eea
font_02_sfnt_off00011876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11876 10812 bytes
SHA-256: 29045cda93c39b1c5f7b90de5242048e54f524fc76fd8e24e00e3fcc34dc841b

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