Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c46d17d5cf0acb…

MALICIOUS

PDF

71.9 KB Created: 2021-09-11 06:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5e04dfaa6b059905bb078ab2eb76d4d3 SHA-1: af9d1c89e537183bac998b228eb3a610f7999809 SHA-256: 89c46d17d5cf0acb4b4baf991b3f5259c210be0836b761a28e431e289918660f
156 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. No scripts were extracted, but the presence of numerous unknown URLs strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613840f5a54f9---22038232642.pdf In PDF document text
    • https://zebcom.in/userfiles/file/gegefedirenilem.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109051718011394.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/72480076992.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210904012333.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/61e12cd3ab9139eafda203ca62cf470d/soxaxodugorapofore.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210905_EAE2FE87851D9370.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/71901503397.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/dekevizuremopa.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/27879922211.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/34261466723.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/76020499512.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/xuxikasapadusugozi.pdfIn PDF document text
    • https://stopserv.ru/files/file/lodatogakemopozepivosopaw.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/faqce0aefgp1kjt8l2o5gqplio/97542325034.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/30781712211.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/febal.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/japovefarovagifewozupuz.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/dakanatuwimusime.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109081803167191.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/vetufuzedusujuronilufeba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mha+free+watchPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/96685180177.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_off0000b771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB771 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 9980 bytes
SHA-256: 6b02d3ab0c02aac2aa2ac8a56cbbe86769c02bd11db06e8ca542f441f95cdc9d
font_02_sfnt_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 17184 bytes
SHA-256: 70530ae21425dd1f6d54bd5380983264a4eb5f5a3bcf8c963722461fe2086f7c