Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6b31a5959ce135…

MALICIOUS

PDF

66.5 KB Created: 2021-08-30 06:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9bac1f8b9a77beb288cc37ab7e7fb8a2 SHA-1: c83bf821c9efc9296504afe8aede39e1a5ba7d61 SHA-256: 8f6b31a5959ce135dae222edd20b93fcfcde26ac5d4aedf976f27ef2537fed5e
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. The PDF's structure and embedded links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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://hanleyresources.com/images/5109870834.pdf In PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/69h4p8bd3hg24s1vm53022b8i3/42173813227.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/196413c12ad1250438e6e9683cdf4866/76534821504.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c964d05c3---29619613574.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/gonizebakibipisuxumufuz.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/ludamezuvoxakugofi.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf9718b093---sokawupuxolixolojemosa.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/39657459408.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607087b847cc8---47274123192.pdfIn PDF document text
    • http://email-database.info/userfiles/file/tofonilel.pdfIn PDF document text
    • http://letdentalab.com/img/files/mapifunibajezozufu.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/bhcfl4ua3jridmh76v6m17ig2c/24383642146.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/84267198494.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/tidogolaleninaxisi.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/10961679581.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/pevopenax.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/zedadupoworikul.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/sabudalek.pdfIn PDF document text
    • http://bjjiffy.com/upload/wepimowosimanawukigexum.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/acf468d8f70cea302d4228b89f768bc7/lafegojizol.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/77849480360df2d31c68ec.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b516481347---17506743697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+secret+of+childhood+chapter+summaryPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 17968 bytes
SHA-256: e56c78e1d4b96b777d1e6f5a60646ec96d7e5be4e48f6688e83bf955b788c664

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