Malicious PDF — malware analysis report

Static analysis result for SHA-256 484594eaf336b1b2…

MALICIOUS

PDF

148.4 KB Created: 2021-09-05 17:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 79b392321c7b3b1e0a81eb5c156b6ef3 SHA-1: d67c379aa278718c3428802c341f85a02b166d55 SHA-256: 484594eaf336b1b2bdb4b4de6cef31b2318825f04da51a69ae7d49f6bd054b58
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and is designed as a brand-impersonation credential phishing lure, specifically impersonating Apple. The document instructs the user to copy and paste content into a command-line interface, likely to execute a malicious payload. The presence of embedded JavaScript and the lure for command execution strongly suggest an attempt to download and run a second-stage exploit or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rasterize+pdf+linux.
  • 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://kochamsushi.pl/UserFiles/file/6756608413.pdf In PDF document text
    • http://aven.su/userfiles/file/86598428379.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/79543709708.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/13538106366.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/91783019820.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f188a0386---11287828463.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/11m7hhmkn4uq52c5abrolarj97/37830671323.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/83860149439.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/dajowinuvevisefo.pdfIn PDF document text
    • http://tms-operation.com/upload/files/23943354108.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/17071981976097b09775320.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/vazejoxo.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c0409034f---59680628404.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/66427012521.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/64574111725.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210812053404.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/bizimofugaluxugos.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/95439da12ca3fecad47ecdcab88725b5/40267336589.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609862835199d---51296220405.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/14978927728.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/00c4737e25de8b4a2c785917d486c418/xipabedo.pdfIn PDF document text
    • https://ocw.tw/uploads/files/wizopulunafu.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106171747243743.pdfIn PDF document text
    • https://tsegypt.com/file/88392115527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rasterize+pdf+linuxPDF 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_off0001dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD8E 10676 bytes
SHA-256: 9ea9839d3e98f187a748dc5fe6fed1cf931dc6a480bb48286bf07ff303b08779
font_01_sfnt_off0001f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E43 20224 bytes
SHA-256: f574a1d46d5339e6d817f6612e4c1c2eb8a931045b929cdaa89bd0502aa9016c

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