PDF malware analysis — malicious · 11ee896baaf16f23

MALICIOUS

PDF

93.3 KB Created: 2021-08-02 08:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: fd1f3625cc1dcbcf04f6c9875ce2d23b SHA-1: 711acb01c74a5f9b6a0c5dede0a36e65a7ada9ec SHA-256: 11ee896baaf16f23af9712249d8186ec717b17f4adbc489e8e9799e6ea6e9f83

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to evade initial security scans. While no scripts were directly extracted, the overall structure and link farm behavior point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://moyamoya.center/images/hand_uploaded/files/99785621330.pdf In PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e015a71d7---67791558184.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/82219793328.pdfIn PDF document text
- http://azizolace.cz/images/file/53073299947.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1f8945c74---wenamotorofufa.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607800a9a9c30---7581540579.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/6b5b2ddb2cdabe2df22cfa5a87be1506/3621859351.pdfIn PDF document text
- http://charivne.info/images/file/bigixekomufumatabu.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b44981bf07b---7220556245.pdfIn PDF document text
- http://flomojapan.com/upload/files/98396769246.pdfIn PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089071f9ed9a---nirabizofededu.pdfIn PDF document text
- https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/93pedo7refge6s0h02pnsous21/94553659412.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5e0204f8---37812875449.pdfIn PDF document text
- http://nuovartea.eu/userfiles/files/kegipiwefe.pdfIn PDF document text
- https://gamma-electronics-eg.com/userfiles/files/wolelegawisafixelaxevotim.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0e432ba06---28935491244.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cab506d453f---milipekojagiduxe.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/2edc320fe4b9344f4704afa65e496e89/sajabanumezez.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8c1b62588b2a8611af7196f13bcc0a32/vumidopelozewikipet.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084467a0af6e---xekafokel.pdfIn PDF document text
- http://soldearenales.com/galeria/files/gutodiwukefuxatov.pdfIn PDF document text
- http://cauthinh.com/luutru/files/jizejuxujagegadazejo.pdfIn PDF document text
- https://evermoral.hk/upload/file/1624226716.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+draw+a+girl+pencil+sketch+step+by+stepPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000e713.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE713	20388 bytes
SHA-256: `dd74f70c39d24fe3271f8a16c5917cf616d628306a313a9d4e328026cbe5613c`
`font_01_sfnt_off00010955.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10955	16364 bytes
SHA-256: `5b4ee1ad06e7867369354d87ce89b2467b83addfbb12bdf5a6fce0e3c9ad9fb2`
`font_02_sfnt_off00013360.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13360	11216 bytes
SHA-256: `73f7af1ff87aa620a0710253bb7e7d0353092b79098ce0e1e6c9492c35458706`
`font_03_sfnt_off00014d29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D29	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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