PDF malware analysis — malicious · e5f9a7d7bcd9815b

MALICIOUS

PDF

96.4 KB Created: 2021-08-10 10:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 5cd1a17bbf462be0fefc7750c2ddd7de SHA-1: 919f18808b8e171c92d78d123ee9b9f58e60a632 SHA-256: e5f9a7d7bcd9815b720440669938d26e59d04be21b89cf516cac57ffd4b490ff

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 a machine learning classifier and ClamAV. It contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to manipulate search engine rankings or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9888

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://xenang-mitsubishi.com/fckupload/file/bewasanutozawukodobeje.pdf In PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8284a25dc---fulag.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/xepenarigegeg.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/hpjggqhlgm2ss66hokem9vqns1/8099899790.pdfIn PDF document text
- https://motodubai.com/uploaded_images/files/33237002233.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9f59b36de37be583b766dc3e61e9580b/zujawaturiximu.pdfIn PDF document text
- https://uniqrelation.com/userfiles/file/9530749275.pdfIn PDF document text
- http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/83569582228.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/aaa68c06dad2e4bcd7c766bd30033238/wezigunipamuzubuxam.pdfIn PDF document text
- http://congluc.com/upload/files/zewivumil.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a58a96c6d---gimilatelupusukegonewoniw.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fb320fa6a---74056986569.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0192498700---tawamilavuwukobejeponesep.pdfIn PDF document text
- http://ksnjl.com/userfiles/files/47652005489.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078521915ab0---51674388217.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9d8cfbc519327a27353ad1023471b6f0/48662991578.pdfIn PDF document text
- https://giga-tronics.com/userfiles/files/dabatul.pdfIn PDF document text
- http://hanasushipickup.com/uploads/files/48899999503.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606d446ca6f33---godukutemurape.pdfIn PDF document text
- https://digireg.org/upload/zodokigibufufevuge.pdfIn PDF document text
- http://timavoshipsupply.it/userfiles/file/nenererikivatalaninodanel.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/d90295e723e5ca77e86c5046e189d158/23885746965.pdfIn PDF document text
- http://pspectr.ru/userfiles/file/vikosokewotowozumo.pdfIn PDF document text
- http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/54894192173.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/xonivadutenesud.pdfIn PDF document text
- https://krantiservice.com/ckfinder/userfiles/files/verunosa.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+a+copper+moonshine+stillPDF 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_off0001126b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1126B	18988 bytes
SHA-256: `54fc5333d499b76b266f5ccd8e490fb5f472bbc5f9d4db7946c85a1640531607`
`font_01_sfnt_off000142e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142E6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00015afd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15AFD	10808 bytes
SHA-256: `0aa0dbd02d2355cda19d6ad320b780696378b5bce27a6914b20edc604b76abcc`

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