Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dec9dcf387cb05…

MALICIOUS

PDF

79.5 KB Created: 2021-07-08 04:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de294dc87b6e24ce62522ca9046496cb SHA-1: 718da2c55b9ebcd513bc8e6567bf540e5af03f2f SHA-256: 59dec9dcf387cb059e2cbcceb2e1960154c528c527e7e328e1e211e48fbfa364
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The embedded URLs are likely used to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a756c927c4c---95416108994.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/457752b07f061321eabeeb11e630ca9e/niwanepijagenazabusa.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/15vch4bp06ui8p25q0hq4fjknc/worizapibipobazetamale.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fd1ef92fa7dd7192b08000732e21dda5/60832340723.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/681846f28d66dfe57997e8bc2d6d35ac/60964065840.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/7646531e096c83bfe0872f4c003269bc/sigoworerupakixizat.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/d3196tccltj9bpkbu2tdb8ta3m/kabemorozexi.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/7b90mh3avmvbgsetdgqklveqoo/tatavewowel.pdf
    • http://icltindia.in/userfiles/file/89014995062.pdf
    • http://carszana.com/image/upload/File/1795246226.pdf
    • https://paperland.bg/uploads/file/12494950596.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/fa91uhf6e30d176075f65gpvg2/pesejopoxo.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c418826b1ed---pijunawonavifojupadades.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/a12mejiiiso7k69nl01ctpne3s/wevoluda.pdf
    • http://orderkai.com/uploads/files/6912293597.pdf
    • http://aucoindeshalles.com/menu/file/39649042738.pdf
    • https://michelbarbot.com/upload/files/28851796985.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/1ff9c051c36fe535f5e818bba07c1656/fukezo.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/6ad2f152832fa69e3f68367f19be7a1f/65374490680.pdf
    • http://bpabv.nl/uploadfiles/file/xipifinemelevawobagimor.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3e079353e---rivilelowofatitune.pdf
    • https://allegypttours.net/userfiles/files/57097975869.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/weraroxaxugoxikuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=java+palindrome+number+checker
    • 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_off0000d047.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 16792 bytes
font_01_sfnt_off0000e859.bin
7c13965061eef91965979f3e2130c60aef432cad2b659c2b95d0ccd80df91bbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 18052 bytes
font_02_sfnt_off00011836.bin
cc915d9cfd6cd3b2109e58c2d26c0d455a3966fb3dc5aa4cd50462a3af1cb521
pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 10900 bytes