Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf01d25d221bdbc…

MALICIOUS

PDF

84.6 KB Created: 2021-09-09 05:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0aac285238bcb49cae2391911f81f77f SHA-1: db3482316abe6398f67f560c08580192fe64968b SHA-256: faf01d25d221bdbc746af51317cc61eb685c5f5fd2bef8d56d66ec198e1a29d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm, with several pointing to compromised CMS uploads or disposable hosting. The embedded JavaScript stream, combined with the link farm heuristic, suggests an attempt to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tomgiongvip.com/uploads/files/file/wujamewofo.pdf In PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138263cd0d01---70897306667.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/gekadagi.pdfIn PDF document text
    • http://juentai.com/userfiles/files/rokoridonedagisopidosa.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/goxumobuzavane.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/13211049521.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/xazovuxom.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/wuwatebupamifatebuxeron.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/monimop.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/jakujowetegazeledib.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/57450277957.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/96154332030.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/fegevare.pdfIn PDF document text
    • http://efrex.cz/files/file/wifopisix.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/161396d3c32f15---dumexililuzuradodavazek.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/mujefaponixiba.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/bogapope.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cb2ba3d83---719190246.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/lajajadole.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109071918577914.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109082132125751.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/fawawobej.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16138e2926bcd2---tomojagogizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=game+boost+apkPDF 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_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 17964 bytes
SHA-256: d828d9fa34ccfcc7eaf44e4862df23e70cb034aceadf5915f1629c753a1c18b0
font_01_sfnt_off000115aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AA 10344 bytes
SHA-256: 9aee97ce4fc7cb4ac184a09bed00bdbcfaa21a78fae015cc0ba6f69e5a645234
font_02_sfnt_off00012ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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