Malicious PDF — malware analysis report

Static analysis result for SHA-256 11855263a98ec789…

MALICIOUS

PDF

96.7 KB Created: 2021-09-03 17:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e62dfc64e3bfee78db771e40967fce3b SHA-1: 5497129da743ffd96bbe523f1e6c3e736c6d8880 SHA-256: 11855263a98ec789fe43c346e62fb14ee8edf3386d63fa2f12961647b90a2af3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript, which is a common technique for executing malicious actions. The JavaScript likely redirects the user to external URLs hosted on compromised WordPress sites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. These redirects are likely intended to deliver phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 https://philabc.ru/uplcv?utm_term=2019+honda+cr+v+touring+owners+manual PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31ccb2f105---fagisevenazunivotiragirik.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/9be771e2c1383e4a274d7de9167f99c6/gorofazuduzofutav.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac69aef28c---29900171560.pdfIn PDF document text
    • http://artospace.com/pics/file/kibupotafuvowonedipe.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/winifufixasegavun.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b263ce0ec353860511a831d003e322e6/61186428814.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/9il5daj7l5igdn7nm9rppm70qs/3268411615.pdfIn PDF document text
    • http://abnicum.com/files/file/70785018482.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/pojuvawumafewu.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/42ol4q2r7qb8tqd03brj0khvho/26673577542.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ac69bb63c7324dcef50bbf7561538cdc/65338164517.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba35c7c5160---49047631698.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/41638541680.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/37127432171.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7c0729ba8a0bf82ca521f9154f86dced/79195695539.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4a09e7a79---podudasubanimumakosepol.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/tvfieemae0j9bm8oebr7da1bt1/sexamiwuvepiwumag.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/35547979972.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/32568368991.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/57f37e46bmg56rb6mbtul5j171/ribuvasiv.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/79979056150.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/29619644231.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/88774826173.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/11526970032.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
font_00_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 16348 bytes
SHA-256: 8fcced7a8fcbf22d45689b44407ce1c1b45b78050135da208b7eeea4fc129b0d
font_01_sfnt_off00010dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 20284 bytes
SHA-256: c8402d558a3e480fd2a64d86f923103bb696f70e74def6d5045359e3cb488af1
font_02_sfnt_off000141c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000159d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D9 11432 bytes
SHA-256: 523a52a86d3ce2fa235668fd9bfe8dcefd3b50dea7d3d4de56bff40bb07679c0

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