PDF malware analysis — malicious · 52c9dc506e8fa2af

MALICIOUS

PDF

87.2 KB Created: 2021-09-13 22:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 9a639ac43644fa0c12d5f47489af5c29 SHA-1: a3a8ce7c415af0ea71bcf58aa79ff5e69f108dc2 SHA-256: 52c9dc506e8fa2afa1f10cea3dc4aa8d9acef5fe0e07060621320b23d3917133

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm and a payment redirection lure, suggesting a phishing or financial fraud attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards exploitation of PDF viewers to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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://pixomot.ru/uplcv?utm_term=marathi+typing+keyboard+for+android+mobile PDF link annotation
- http://angelofthewinds.net/ckfinder/userfiles/files/36799181694.pdfIn PDF document text
- https://kolbandibileklik.com/resimler/files/88171767116.pdfIn PDF document text
- http://hzdsbg.cn/uploadfile/1630768586.pdfIn PDF document text
- https://iringmalaysia.com/ckfinder/userfiles/files/butatinusipokumuto.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210913044851768.pdfIn PDF document text
- https://artinterior.bg/userfiles/file/94773116415.pdfIn PDF document text
- https://granitnet.hu/editor_up/fopekazijave.pdfIn PDF document text
- http://glavis.biz/userfiles/file/42853517832.pdfIn PDF document text
- http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/kezodukitireza.pdfIn PDF document text
- http://liavanhaeringen.nl/userfiles/files/73158976529.pdfIn PDF document text
- http://dreesmann-foto.de/userfiles/file/41767963843.pdfIn PDF document text
- https://responsible-tourism-alliance.com/content_file/files/tibamimolatilotalaroj.pdfIn PDF document text
- https://eghamatsafar.ir/basefile/eghamatsafar/files/vujive.pdfIn PDF document text
- http://indagosrl.it/userfiles/files/81218634188.pdfIn PDF document text
- http://fullerton.kopanramen.com/uploads/files/domipofimenulebudor.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8a48cd0b320c9d6c774605eb00fa85e0/mefufosiwijewozidufev.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/xoxijufulunitibotixanirom.pdfIn PDF document text
- https://godahoian.com/app/webroot/upload/files/23497187750.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16130f663926e3---gexodesawexosavogomovi.pdfIn PDF document text
- http://nonstopsushi.com/uploads/files/pezodifomikubodofiwi.pdfIn PDF document text
- http://hidropro.hu/upload/xukobiloripavoxuv.pdfIn PDF document text
- http://buyo-g.net/userfiles/file/64019695650.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_off0000e838.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE838	11116 bytes
SHA-256: `b54b294e2580ba539833b3c654bb71a54c78d1325272a6a60018e8be3089d8e0`
`font_01_sfnt_off00010186.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10186	20164 bytes
SHA-256: `a330db1f83338fb9be996761d018a422110505a743f1d76732d864e3d225fa20`
`font_02_sfnt_off000136fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136FC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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