Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7aa5243df6737f…

MALICIOUS

PDF

80.3 KB Created: 2021-09-08 11:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b64f5dbb33a77f55cc74f6ab2eda0f72 SHA-1: 375ec072213de53ee59db066258ba0c0d3730bdd SHA-256: df7aa5243df6737f52c1141e95770648e524600593d583b32bd059ca559373d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains embedded JavaScript and a large number of external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm for SEO poisoning or phishing. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=nutrisi+tanaman+hidroponik+pdf PDF link annotation
    • https://abe-rdc.com/userfiles/file/1037053982.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a5780bee8---dugaxexogazepovijelofo.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ka3bmm1g9n2m2b005bp8csib1g/dobogagekapezed.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/xedufewipupebezomegero.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/2aaf1889d98cf6b11ddfb95649cc45c9/3551652289.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jit694u0vf06onp56fqtasbnfo/87040239365.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/244b9iopmlrvputvdhbrcc5ih1/71851505681.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/dc73365cc3573fed2b0dad0aac861bf2/tinizo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c155b23aea6---584371209.pdfIn PDF document text
    • http://leskovec.eu/files/file/26306298974.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/jepumenoliwubitubi.pdfIn PDF document text
    • http://moneymaker-gold.de/files/kivasokapaneb.pdfIn PDF document text
    • http://congluc.com/upload/files/nuroribodedov.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/73079673010.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/19f17435fbfd19024ae8778937c46c05/99027521275.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/bc82d5cd0687399f1887a81effe06085/89404009672.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/wukapikisutozuzoguwegimes.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/wivamuwoxeburez.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/59819148517.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/49258328756.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608567dc3025a---69724661805.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/bavatedanarulatesigubu.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/mirolebila.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0560b02c4208eae13a2cffb533082c48/jipujujopumaruse.pdfIn PDF document text
    • 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_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 10752 bytes
SHA-256: e71b359592aa73a1b3317714ab5aa7e9a9ff6ba1a2487e9c49759da6e72d2413
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 16764 bytes
SHA-256: 74dbabeac631eacec9028a7c306fe3aab00490db5a3584a6dc156ff2454e2c18
font_02_sfnt_off00011bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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