Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcd9e9b77a603d6…

MALICIOUS

PDF

92.8 KB Created: 2021-06-28 23:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c3cdf7dce650e5f34bd13d46eb21eb0b SHA-1: 78cbaaf3cec2fb4fc660267af9a17dc96212b776 SHA-256: 2fcd9e9b77a603d6f9060c705eb14c16750cf39efa70c492cf46dae7f3f05fb7
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm. The primary purpose appears to be redirecting users to potentially malicious or SEO-abused websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://myucmas.com/userfiles/file/50674294886.pdf In PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/godoziburu.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/lawawokevivusaremiruravud.pdfIn PDF document text
    • http://grimastone.ru/files/nelebejutajumowafilep.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0db5970c---wekufofenefa.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pabunapuziwepitofubeko.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/74220719431.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/dcdc322a3f9039b97f7e328430a1fcfa/58776459781.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/c5842921ff5b8b7b741beb3d3ee7a9ee/60632785776.pdfIn PDF document text
    • http://atek-ent.com/upload/file/surifiripob.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/bavutir.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/79532489196.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/74885199409.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609852974e857---90509377022.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/94699571092.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876959e74ab---49993792424.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/65e5405e955178f4103a66d85ead0544/84523911124.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45890a9ab5---54328093395.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfdf3eaa97---zemexugukuxosidenusowel.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/97675b81480adc2701d96342150d1f04/gorevevekumogusudov.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/kukobufopemulojikate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=warframe+melee+combo+counterPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 10468 bytes
SHA-256: c4ecf007123ee5da194a683cc8b08a109d7bae900f29527286301b149ac2df52
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001218c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218C 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off000136cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CD 17804 bytes
SHA-256: 472bdd7d6523796244dbbb5349fc5ac7f11faca2757d7a78d6594ad4953ae9a1

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