Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4014b713841761d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 05:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c9d68ab7aca5cc572ccaf20a5b16fb5 SHA-1: 64c161d0700b68514eae8bd7533a78d63a38b8bb SHA-256: f4014b713841761d95fa7f89b1a808fb5673968c80f8a109d82babda7c26b4fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, some pointing to compromised WordPress upload storage, and a visual download button lure. The document's primary function appears to be directing users to malicious websites or facilitating the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://archism.ru/uplcv?utm_term=123+free+movies+free+download PDF link annotation
    • http://gospelpour100voix.com/fichiers/newsletter/file/53284330292.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210913/210913191039164741jjfexhjkkshx.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/34861963644.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/57775652640.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021921398565.pdfIn PDF document text
    • http://tecksco.com/upload/files/fokifetupufexebutujim.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/653db15b4c23864ad50a3f3c1268b444/45411988118.pdfIn PDF document text
    • http://renknh.com/ckupload/files/vitazifovod.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/jezowefarojipedajeta.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/luvugagesawamipub.pdfIn PDF document text
    • https://sainaudit.mn/File/zezadoboxojabalobidab.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/susagif.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/58680708048.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/zutajolu.pdfIn PDF document text
    • http://professionalcatererspaul.pageindia.com/resume/cms_files/files/89849375997.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f19e046633---80575575264.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/dozozesobilej.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8afd985af---52131741375.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc6f8681cc---mulumemejibasogoxufanavil.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/8548022735.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/wameterefigeg.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_off0000dfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCD 10816 bytes
SHA-256: 7545623a393b3e51e08c4f1e7dd005116beb105dbe8274a38fd2349a46840396
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 17484 bytes
SHA-256: 03f98e9dfd815ab63077275a87db0ce7c8def9408a3aada2ed9e2815260aafaf
font_02_sfnt_off0001265f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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