Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d5d06e4003164f…

MALICIOUS

PDF

73.1 KB Created: 2021-09-04 19:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c2b71cb62d42dfacec44f166deceb6b SHA-1: b28852b23eaac770ab0a8d2ae56b813a12a70d46 SHA-256: c1d5d06e4003164f72e5411987c2602ae17e3f473236bd9f80d4727e0f5e035f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://mistral-paints.cz/userfiles/files/zodamixizexije.pdf In PDF document text
    • http://technoauto.jp/js/upload/files/fanovuz.pdfIn PDF document text
    • http://iknow.pl/files/file/9503112888.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/zataveturirupaxiraj.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a934fbaed7---xejaxunale.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/94660387157.pdfIn PDF document text
    • https://hirurgija.me//files/43060368674.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ef175c91---nekenumuku.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/mowesoxedavepeduvunide.pdfIn PDF document text
    • http://thegioioto.store/upload/files/pilufo.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8e9d72e42912a77709c740ce1b353087/debaza.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa13662fb---zodizoduneb.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/16636531069.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b754e94a3ea---41529515867.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1c8f98c68---66033045894.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078adacf0050---43894389325.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/46mv7u0enjeml1hjna521a8ad4/vaker.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/95177916618.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160825fb2dbd79---xolareb.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791bd1ed8c5---dowatanasubap.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/62040368960.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/53962008838.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/74482269255.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160932010bd01b---77290397469.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/922b17878b7b31563d57e9867ced0564/81911501851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=convertir+imagen+png+a+pdf+online+gratisPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/42aabcfa854d80bdd6afbd0c0f082fb2/36928139594.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_off0000bba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 16384 bytes
SHA-256: 8d80014b2852683a98753837c4733657210423d178db6bf093108adadb60cd4d
font_02_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10940 bytes
SHA-256: 41226d32ce0fd4170b910cbdb60d346bc1f1c99caa0833523e2789cedf99a789

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