Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3138bd9a1f0291c…

MALICIOUS

PDF

132.0 KB Created: 2021-07-03 02:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fd30ff0bcabb9d70fdf6020c876358d0 SHA-1: e0e37bb8d7ab8fe8ad52f1b4a83cecd26ef9d932 SHA-256: d3138bd9a1f0291cccddf9e737a76532419436e8dedddcb220b3e7bfa24318ac
212 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external URLs, indicating it is designed to trick users into downloading malicious content. The presence of heuristics related to password-protected archives and download buttons strongly suggests a phishing or social engineering attack. The embedded JavaScript likely facilitates the download or execution of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=mechanics+of+materials+by+beer+and+johnston+solution+manual PDF link annotation
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096eb8981a6a---89592628054.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ddbj9pesmefvgloere6lsjfcm3/sawozixonosixa.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ea16eea77e27a238b40ad35719217b8f/filos.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bj336861fgdlr4t2nb5mhv52h0/dotigosifu.pdfIn PDF document text
    • http://llux.vn/uploads/files/nalarokuwunax.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b03e513a3---pijovujemikor.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e4feb6fd5be04696931eb3ccf8508826/39164545023.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/krb2dmsp1q90l6hs7ob7a13iag/82836753658.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/66905962453.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/lusujawafop.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/17038918398.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9194a1d1c1---japupi.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877a9344e02---21542269907.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/568032071a2ad34d6d42b9d8e4cccb57/15203631177.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/8274p1t9ftqft9tlflboe3qka0/95434140605.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/84829258080.pdfIn PDF document text
    • http://unsersohn.ch/images/file/96836746937.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/28854487513.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/tibonuwu.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/8221018863.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/69370437140.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/82703094026.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/86462514648.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232eb9dde7---nuxaluzawud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001dc4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DC4C 20732 bytes
SHA-256: e4d779afeceb161775d6a3af43ec193905245769806ab0024edd3641952448cd
font_00_sfnt_off000174a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174A7 19772 bytes
SHA-256: a2830e14fa094aa2bb7052907fceb5ff8a27c69207410ef116e17f91f1bb0232
font_01_sfnt_off0001aa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA2D 11216 bytes
SHA-256: 6e841edd5a75ab6a8dc248018fc6974a226f508fd2532c8747026a8591aadf9f
font_02_sfnt_off0001c43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C43B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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