PDF malware analysis — malicious · 2ebf021aad7528b4

MALICIOUS

PDF

85.5 KB Created: 2021-07-09 12:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 17c97d82cecb4c70a77983ca5aa5b1a3 SHA-1: df84af617b84e5f6e722e58df52b79b18e923783 SHA-256: 2ebf021aad7528b41f82e0327b8b9fe5e831be7ad955293ab2988d511c425601

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it's designed as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=how+to+get+free+robux+on+iphone+2020 PDF link annotation
- http://bioident.pl/photos_fck/file/70470675463.pdfIn PDF document text
- https://catequesisnavarra.org/guiarte_userfiles/files/warelenabudisubigumig.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1a47eb2bd---letorewumipuvipepi.pdfIn PDF document text
- https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/o9t0q998e21f8q9uk2qqtured9/wojufizoxirefagalajet.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/79013139754.pdfIn PDF document text
- http://ventilatoryzlin.cz/images/file/badodizufe.pdfIn PDF document text
- https://akproauto.com/nbloom/fckuploads/file/45856130516.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/r7augnlo9oefuuld1cqpdbgr30/3455743219.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc12f624b7---5091865611.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c926096db14---64381706081.pdfIn PDF document text
- http://reanda.com/jingkelun/userfiles/files/20210530143547.pdfIn PDF document text
- http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/78517379100.pdfIn PDF document text
- http://strahovka66.ru/userfiles/file/52229673091.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e39c3ae14bbc7a6936a682a331dca576/fugatodikamobiwafekepe.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608825943dbb5---4193754702.pdfIn PDF document text
- http://otvorene-srdce.sk/userfiles/file/9284493713.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c13048a49---pevamepofopobi.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8tb8532f5h0fpv9ddjblrov9sk/forapi.pdfIn PDF document text
- https://markiza-trade.ru/admin/ckfinder/userfiles/files/42649812682.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608769f7913d5---lulowijotiponu.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079794c3a712---nipavawoforobez.pdfIn PDF document text
- http://szalkasszorutacskok.hu/app/webroot/files/content/files/59072930.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/04ece0987cae9d2bef05bfd46e874902/maxijabemufukonebi.pdfIn PDF document text
- http://tz5168.com/uploadfile/image/2021/05/31/file/20210531_001706_127.pdfIn PDF document text
- http://kalkulacka-hypo.cz/userfiles/files/68060308888.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_off0000e8c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C5	10920 bytes
SHA-256: `e067439a5b496b162b9b8a8746673c9d03a1c3039ec31de8f338c2225f3c0c19`
`font_01_sfnt_off000101d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000119eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119EB	17792 bytes
SHA-256: `1efe3b91efd588e656869bd98b115b05216555872f5e3593f85ce2a05d38205c`

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