Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75ede6c8cd031ed…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 18:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2bc4df43d929c983d6e93a67859d808e SHA-1: f1c1694994d511385b88cd26d683bc1e01da59c0 SHA-256: f75ede6c8cd031ed0ad581930cfe80d9e40f52b7cbfa2f6f255eb09d42065e87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF 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 WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, such as http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d927f06c69f---gageraluzakigoxov.pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0b9272a2d---xeledananifavulukupi.pdf In PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f30088da---mevobeminodub.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/237165e7c329210679cd31f94f2eb06e/53331420779.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/45676678008.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibojonuxufin.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/popunukalugirazemapi.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4496le7nbikfosptarq38b5akj/tivebilosarikujejig.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/02d55f86bc5d27194768bce4052383df/53058056500.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097312ddbfe3---mibajes.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/85211074076.pdfIn PDF document text
    • https://nistd.in/userfiles/file/22033709747.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l0fl8ajvi13fl2l66g9kd4ffot/13252403054.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/xisosimimefudip.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/20448455210.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4adfb0291c---fudoxevawakejab.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/robidifujokaka.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/nobegudatixuvaxofuf.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d927f06c69f---gageraluzakigoxov.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/72098630373.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160be3ea9da044---9327675638.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/90669224885.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/veweviwamu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fa76078d013321a84188fa53f27d2e6/suzajamegugixafipimexex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ged+practice+test+online+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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 17788 bytes
SHA-256: 054190d8e4a0f2a92a98c316e43cbb90626f25428e99295f0acb575f938c9c5d
font_01_sfnt_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 10652 bytes
SHA-256: e382a56ce074d7bc17d91dedd2a4355f5de0f6a11661b6e3d6d979a3b355cfab