PDF malware analysis — malicious · bbb7fa35040ecfe1

MALICIOUS

PDF

79.5 KB Created: 2021-06-27 01:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: f8960481d580fe2d5248b433710be841 SHA-1: bdbf7cdb873270827a38b3aed73cd09585cb045c SHA-256: bbb7fa35040ecfe1d2dae0a86f632aff1be34258d3c8546431e6c872789c5d94

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting domains. These links likely serve as a distribution point for phishing or malware, aligning with the 'Pdf.Phishing.Trojan' detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a4446f3389c---kebozuxusumevez.pdf In PDF document text
- https://vieclamxaydung24h.com/upload/files/79668403923.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b193f03274---wesotimitokipufelepogek.pdfIn PDF document text
- https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/b3857b70e92b18e4917f2abf3ac695c2/47025351795.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dffdaae2e---5936224339.pdfIn PDF document text
- http://www.derbysignandgraphics.com/uploads/file/89713208133.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dfa773a92---22255461469.pdfIn PDF document text
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/2ccc882d723a2e7bb8873b313d447cda/simoruzerajugilupas.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6124965c7520b149c792c2aa0c905cbf/55087692923.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0bdvtmgjb109ib5vta08ifuak6/mimugevanolarot.pdfIn PDF document text
- https://vibangthuaphatlai.net/uploads/files/kuledokejifotorafo.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/89019852275.pdfIn PDF document text
- http://creative-format.com/upload/editor/files/18513064659.pdfIn PDF document text
- http://sutphinsgermanshepherds.com/clients/21958/File/67242786122.pdfIn PDF document text
- http://bulk-supplies.com/userfiles/file/maledolorado.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a8c7ed9fca02eac415046658b1467a46/84928651494.pdfIn PDF document text
- http://airconbank.com/upload/fckeditor/file/60862244836.pdfIn PDF document text
- http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/15551380123.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/on25iev5foft6l2l4pboloe6q3/14502187426.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dh196iekv5s7289vabb5tiued0/11906004560.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/607afb608ad8e2a48e7690aa2b4c09d4/jifovelaxifapiwuvapa.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/71308c05a2e63c2a93f2554d3f81db01/2569760717.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/8fa5f76d9adb4ea775ea17eaf4501aad/48293202992.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6d1es9tth4ud8ostbn1dtqu13o/rozaxubuv.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/ecc61e8584c28adbee3268c813221a47/lelimudotinevidipifowudur.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+delete+blank+page+on+word+documentPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ebfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBFE	16520 bytes
SHA-256: `9793a1335095bdc80f698a9f03b90b7c5d9aa8174dfac442ef105034375ef88b`
`font_02_sfnt_off000116ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116FF	11004 bytes
SHA-256: `fbc077f06b0aa39dd13b408c0295533009227d1c9532925365b739d3d92a4893`

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