PDF malware analysis — malicious · 5c6e9ba3c9a9f5f2

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 15:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ea5ac6e91209a03c809869c8294854d7 SHA-1: ae8862b4e678a7b8e50b7d3bdf4623ac12ed2804 SHA-256: 5c6e9ba3c9a9f5f225783ec060c9727afef80a25929fe848fa3d836a768a03e2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to potentially malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

Heuristics 6

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.
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://wastran.ru/uplcv?utm_term=production+possibilities+curve+practice+problems+worksheet+answers PDF link annotation
- http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16077d32b47929---16994967500.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f90b11a505534f1d5ab06dfd40daca3/46387412660.pdfIn PDF document text
- http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/fusesuvoravotefuvulibigo.pdfIn PDF document text
- https://rosewoodcity.org/nbloom/fckuploads/file/zolixadexojimuvifufaxur.pdfIn PDF document text
- http://hasicimosnov.cz/foto/Image/file/29594030750.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7db97f94---47491142879.pdfIn PDF document text
- http://ttccid.com/userfiles/files/lijejomupesetojek.pdfIn PDF document text
- https://tradingcall.in/ckfinder/userfiles/files/fatukowemexegegud.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9f6991da---43714163761.pdfIn PDF document text
- http://thedreams.cz/files/73878808696.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27d5bb2827---71209960478.pdfIn PDF document text
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16076ccdc809d9---63772692145.pdfIn PDF document text
- http://longarmquiltacademy.net/fckeditor/userfiles/file/84506195870.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f50d58cac0---8711733652.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080333ca8f5e---wizukixosepofumo.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gdhvhec6lchm7sjaqfk0scdtmp/52896425721.pdfIn PDF document text
- http://feach.ie/images/uploads/file/zoromefol.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b6571b990bf---2068010533.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/17b474dfcbb2be555829b7a2bdcd3993/nafojikita.pdfIn PDF document text
- https://rocksoliddesigns.biz/userfiles/file/rodovapi.pdfIn PDF document text
- https://lescourailleurs.com/upload/editor/file/jigamotofenaxugibaxut.pdfIn PDF document text
- http://nextgt.eu/uploads/file/timoxagumavudu.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/70b70cd3644fcf43b31688ce1d98f250/13864264287.pdfIn PDF document text
- https://gemwares.com/userfiles/file/34207668356.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/9r94349q26caussvc1j4f2gdcp/1784461374.pdfIn PDF document text
- http://e1pl2.nazwa.pl/busy/fotki/file/dekobipelekukofilozifego.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e3d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3D0	18608 bytes
SHA-256: `bc72861eabbf5ecd111a9160c3b71218eee59743d3c0678ef545a34732295a06`
`font_01_sfnt_off000112a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112A0	11264 bytes
SHA-256: `3b7e5cd01965c023b0058733eec135033011c98770e1debc418647a7ffa1639a`
`font_02_sfnt_off00012cb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CB8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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