Malicious PDF — malware analysis report

Static analysis result for SHA-256 69284adc38272f67…

MALICIOUS

PDF

83.2 KB Created: 2021-07-23 12:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 287c2c81193c0487b2c2c12061d4a510 SHA-1: 4c6adc8b07b47493d58117596317b2e35796dcc4 SHA-256: 69284adc38272f677ed37065b5127523f5b4489ec59f04e1e895f43d9d5a94e8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan delivery intent. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to download and execute a second-stage payload, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

Heuristics 5

  • 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
  • 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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607775cd0fdcc---41615148722.pdf In PDF document text
    • http://nowyhotelik.pl/userfiles/file/36571778512.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0a88bd53---42170836139.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/94340748142.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/80187176511.pdfIn PDF document text
    • http://chhsmahs.com/clients/8/83/83f479e57a8bbaec88b4a04d821ef24e/File/76385396884.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/dorevibunirodajes.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/79448733259.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bff94ef101e---fofumiruvurum.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a444e636ad---wugegepowogukikikoba.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/xiroraxegifidawofifidozij.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/3f959b04ba8b43a67ca7b1e03d944fb4/tigakimemapanuromi.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/30946394604.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/06f043f599c6118f2c64beaf3ee8f706/67679052067.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/56611054957.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2eqbr00u8e0j1qprsk8uuauugm/gowikunobojawogopobakexa.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/530ede7d151dbcbd03a4fe4a98b3bc9b/gumimegitezuxafanuxoxazaj.pdfIn PDF document text
    • http://lblussana.it/images/file/mukinegirikijina.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e55030b37b---wojegikaxufekonelodu.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/toxemedazodujojevu.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021051811261932.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/240b9e677b13aa6bc24ccc6a7bd06f3f/74130112764.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/35125621781.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/mozofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=carts+and+wheels+class+4+worksheets+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 10912 bytes
SHA-256: 580e2e73c9ef7a3fecea3215e733f1655f6ba87cdaedc114770ee076a55aeb96
font_01_sfnt_off00012122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1