PDF malware analysis — malicious · 82aeb90360d23ff7

MALICIOUS

PDF

85.7 KB Created: 2021-06-29 03:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 7f350a55cd992b6d66d4f135b08ed056 SHA-1: a919cd0a5a64cc2055ed7e02a2702c532debd9d6 SHA-256: 82aeb90360d23ff70249287f7d41d4fe23cce0e973d7369534b5f5d42820bf18

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, aligning with the characteristics of a spearphishing attachment used for initial access.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160896faa98685---6898516009.pdf In PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/2cf9808eb2afd6b7e5124fc7e9ddad45/43667290054.pdfIn PDF document text
- https://honghow.com/ckfinder/userfiles/files/gupogagan.pdfIn PDF document text
- http://autoshiftbid.com/fckeditor/userfiles/file/linafipogudizozufokisevo.pdfIn PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/413ebpaslqbg2je90rkv4a97m5/89042297134.pdfIn PDF document text
- http://dade666.com/userfiles/202106file/2021062318164670554.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51a3c99b99---nevupujizopotux.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/fc060fdd157cccd6a02bf03d1acddd21/diduwuxefopedefewimag.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607511f51ed7c---40818035706.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d799304673b---91922999086.pdfIn PDF document text
- http://khodahoanglang.com/admin/webroot/upload/image/files/3719872191.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/nevewukosodesep.pdfIn PDF document text
- https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d173d0f073---9823180249.pdfIn PDF document text
- https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d15eaf938---vovovilewenapa.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9fee9170233d0024d8ae1c65a105a62f/wizisoneno.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/l4trnv6lmfp9ovls8nemp2jqe3/33975197264.pdfIn PDF document text
- http://cuadepthanglong.com/images/ckeditor/files/bofekafunudowikeb.pdfIn PDF document text
- https://hkparkkonutlari.com/image/files/49091617378.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/08ff47f77886a419813e673ebddeda23/nabow.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160885c93111f5---murugomixubemalizibimixub.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/144e3ced0619cd40655b6889a4e63389/52901623553.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e2e49101---11469091067.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d88fd56ad0---tudilosasafujipumuxax.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/4449d4efd238d1cc0f90cdd43339408f/10514817765.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/vilufexitiwigidok.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=being+smart+with+moneyPDF 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_off0000eba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA8	10764 bytes
SHA-256: `03a35626f387b121d5314d0fe8825179733dc49f8bacc1bf170b229f1efa6733`
`font_01_sfnt_off00010457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10457	17324 bytes
SHA-256: `b00b62903b4bf5cb9e9b3756a5fa10a3e0961738962719fe2c6b869141846526`
`font_02_sfnt_off0001316c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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