Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc43d28e4d25e2c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 01:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4c9982398f31d5392869b68a8b999173 SHA-1: 927fc3308673be4347488c8d26fa689492b345e0 SHA-256: 3cc43d28e4d25e2c46ca2d814b97444a9941b2cecabac0941a9fbe845d6ab0c1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. While no scripts were directly extracted, the nature of the link farm suggests it is designed to host or redirect to malicious content, potentially phishing pages or further malware downloads.

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://kildevangen.dk/files/rekixugiber.pdf In PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/elbefttscvrno4phdlhg8kc7m0/suvan.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607201babba73---xoxobuzujos.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/xuferunezatozub.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vajivaruja.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/41585453435.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/sovewekarulunonexepej.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/jogekajowotoleg.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/j29se4fk3b20qv0t7oi76kv78t/16233572475.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/33943544723.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/fefogetakelolenimiziruzon.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/7acfe8d927c048c5a9b737ae440af818/66882641077.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/8107200478.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/11160429981.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607076dbcda10---66958535946.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/51487358931.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/fidogede.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46d992d68c---lotunim.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/60761262580.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/lojabutifujivevet.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/gonewejerazuvovawofop.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff57c438dd5193791e56d64094052940/gujixiwe.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/8326312238.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=vte+guidelines+2018+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_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 10864 bytes
SHA-256: 907048c91ebcc9c30f9e3784df175c040c546b77e3bb8f9c74569aa5d825d6fb
font_02_sfnt_off00010762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10762 18320 bytes
SHA-256: 5f3874d89b7d68f9be450efb3d7118b891da5f8d92977e1b1b5269d0280278ba

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