Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a65cc8c96aa59e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-05 21:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 00abec5802a4fa002e4559cf9b009892 SHA-1: 38a1b42a68aca8d4216233e48b0a662f0edc05a3 SHA-256: 47a65cc8c96aa59e7bb7b35e1598190902ea061a002bd005658e5a07422e7d36
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised websites and potentially disposable hosting, which is a common tactic for phishing or malware distribution. The presence of a 'download button' lure further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tumwebthailand.com/ckfinder/userfiles/files/36795767545.pdf In PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/a9e5881635621902e3565b1dbf382306/lixiduwokuv.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/12206909591.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/39bamjuv4o1ha7ceaivhapbp03/nobejurekuwez.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8c583b0f---72256385336.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/16637065645.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae4b58b6e9---99851996637.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/egrsm5adth3qfddm5cl9hgnaj5/wireju.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/25396360784.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da9e6814a8e---20402377678.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/micjn2okqgk75gf9na5gt1idn1/xapugawatiga.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/6s219370ini8dclhaccppepa67/vitafeximosuzexovujolexek.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc51325f89---gurijukipevaf.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/biduzun.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/rosaba.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb71342b847---vegevimixiduti.pdfIn PDF document text
    • http://unseretochter.com/images/file/5869050579.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abe780d1589---bakixa.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/fd990bd595938cc230cb1da163ed0055/zuweselu.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/6551291537.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/xoduf.pdfIn PDF document text
    • http://ruihuitax.com/files/file/90397108746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=alphabet+tracing+letters+fontPDF 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_off0000dbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 10880 bytes
SHA-256: 9f6fee3803c44eca93183653bc3f67f7e8730dd6520cfab123a14778d6217ef9
font_01_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 28752 bytes
SHA-256: d2f6f73561e132be9e0095e7e512c58ec24d2f995222f3ca94380947efe6af1f
font_02_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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