Malicious PDF — malware analysis report

Static analysis result for SHA-256 59be9c90d9995456…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 03:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b3e594c840f1efe9d1c0711e5d3b504 SHA-1: e17165311dd2c738260491699c7ee36191c354e7 SHA-256: 59be9c90d9995456c698f877acfa2f4261ad9f221957314fa38c7cca0d8b4980
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware. The presence of external URIs and link farm indicators suggests an attempt to lure users to malicious content, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=red+sandalwood+powder+and+rosewater
    • http://bjbtrh.com/files/pic/file/girobuguwetigevixir.pdf
    • http://faradbox.pl/files/file/lasaxobebeve.pdf
    • https://giverny-bkk.com/upload/files/jiwekebu.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f3b72b70ee83510e25ac3dacedce92e0/66238304630.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d94d2646---64714213108.pdf
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/38130875393.pdf
    • http://pogologistics.com/ckfinder/userfiles/files/71016010912.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/b9165b6323ef2e755902483bf8518416/lixovavadajenev.pdf
    • https://mabuksusu.com/contents//files/99580240945.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da8f29e790---nuzovedosezenaro.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b1f858a25---warif.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724eb0c7ca5---21876497117.pdf
    • http://sugarfree-gelato.com/upload/file/14445194175.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/bo1aj345mdm48dsu1fudds1mdd/91839624806.pdf
    • http://csc0451.com/userfiles/file/20210801090333_8388i3.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726a3a87418---likudofaj.pdf
    • https://etonbio.com/newsLetters/images/file/titomijidejavigidazatefiw.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/3e7483a4b538a4ade2f7cadb9616e6d2/12988410641.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/69620483156.pdf
    • https://seltec.io/images/uploads/files/gubarogugajakomexewoke.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff685c62e---52181822585.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f951ae8c1---77948844551.pdf
    • http://skikk.be/app/webroot/files/userfiles/files/rewizixukugif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 16792 bytes
font_01_sfnt_off000100dd.bin
3e9993cbf2f4b2ff0f5c31abba6ad71b4b571d1f83453f013649ae698e1c4cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 10424 bytes
font_02_sfnt_off000118ae.bin
e60049cf98fedc008ecd105febd79e687331c65cbcbe1edc3c7b70d6abcea294
pdf-font-stream PDF embedded font (sfnt) at offset 0x118AE 16852 bytes