Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb860bd6979a287…

MALICIOUS

PDF

81.8 KB Created: 2021-08-25 19:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: e5b0617c1723c0e48533c15b01028dba SHA-1: 37d26e668f3af961ce7c815f54639eaa019a697f SHA-256: 5eb860bd6979a287fa8171d6c7a527ac6b8575c902acc8200e97db53f45d5634
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of a 'download button' lure further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://goldenagegroup.vip/userfiles/file/23752969612.pdf In PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/5ao2ht7m63stdiid8qld6763e5/semuf.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce44718a61---54645295422.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1ebeb15d---37268602595.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/ligamikejixik.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/7nbh4ue278gcn8dmikfu6g6ba2/jupuga.pdfIn PDF document text
    • http://surausa.com/uploads/files/varovojebuwuvomapot.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/rijufomapenutumejufo.pdfIn PDF document text
    • http://asustainable.com/global/file/fawuzilejodilisusin.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b3b8c1781e---41371001117.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18ac529fa---wejamebefarupisiruzipemu.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/17539195919.pdfIn PDF document text
    • https://webmenuplus.com/images/file/11024911967.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/dorur.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160999fde954b4---69909317740.pdfIn PDF document text
    • http://weingut-suppan.at/files/susawas.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021081216020315.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b6971d4e---nobaniruwam.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/jvlei9o16nahkqiq9ggvkm57dv/sagajojijagefadolexafameg.pdfIn PDF document text
    • http://land89.com/ckupload/files/wiwigiwununaguvetuleko.pdfIn PDF document text
    • http://clarasonic.com/upload/file/24590869053.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/73297050276.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/dovitapinamavefokowow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+art+of+leadership+6th+edition+free+pdfPDF link annotation
    • 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://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_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 10724 bytes
SHA-256: 8c05f1eb6db769507d199a29761d9ace0b8d17e0cd5d37072a84d649285a1869
font_01_sfnt_off0000f73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73F 17544 bytes
SHA-256: 97d63dbff14b406948c802af4fbecbcf49b3585155ee86bc19d1e2851838ab87
font_02_sfnt_off0001259b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1