Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abb7c93c02bc99b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-20 16:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5315f4ee33dd00ecafa2a0dc868eaf2b SHA-1: ad502d30593c30d88d8de0be4156851a2774f8d7 SHA-256: 5abb7c93c02bc99b9d9a0a97b47d24f237892de5a7eb3c25bd5b6f616fbe09c1
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 pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics suggests the primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=windows+movie+maker+google+play PDF link annotation
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/lilinejugonilatinejejurop.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/3180656603.pdfIn PDF document text
    • https://www.anoregmt.org.br/ckeditor/ckfinder/userfiles/files/fegibeju.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/31339995581.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/27bff8adfcb71208c2cf423ba3363315/75534410180.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/389b8d81079eabc7b5d62b8e7c38c3f6/fanoxomuzikivulixutu.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/30956651878.pdfIn PDF document text
    • http://plncse.hu/php_data/file/27199139192.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gesikaziwifabupiguvowelag.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/nusoveb.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/22255603354.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/gakevumopuwisabobedib.pdfIn PDF document text
    • https://parkettworld.com/upload/files/forewokuna.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/86855520184.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/ridosagilenososekazaro.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/dubupujegozewivu.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/kuwipowaxodawerumesu.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/gotebirukemo.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/70519354305.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/rekiziwumekim.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/37061024015.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/8f033a554ae548d10cfd49a20c16bc79/vuresevivikutirugoruf.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/35051157791.pdfIn PDF document text
    • 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_off0000b921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB921 16756 bytes
SHA-256: 298ef3f80ef3b764bd88e2459bf3bfdd008ad58f6dc0c8457022297778400a1c
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 10988 bytes
SHA-256: ecf62fba5a41624ccd5b0013a282fb6d07926fe56cd395634cc379006859ac25

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