PDF malware analysis — malicious · fcec6c67e0244b13

MALICIOUS

PDF

81.4 KB Created: 2021-07-04 19:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 4db69be69f9703af5786296ba61f3157 SHA-1: ee32eaf8e8f1cfc6d7a0523c8247637397e4c420 SHA-256: fcec6c67e0244b13896bd5370dbaf9791490c782fc74d02e420db08c3568bf5d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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+unmagnify+a+computer+screen PDF link annotation
- http://china-zub.ru/userfiles/file/renunan.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd51d74c0ff---44362207787.pdfIn PDF document text
- http://haozuowenwang.com/imagefiles/file/63009614942.pdfIn PDF document text
- https://walkandsmile.com/userfiles/file/63346490583.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc113d8cb3d---rolojeratifoxowapu.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/bukevasuwuj.pdfIn PDF document text
- https://creteotels.gr/FCKeditor/userimages/file/91620018803.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/511d32433fc8cd4f82795b329a228f39/goxawoketinukuxikunimi.pdfIn PDF document text
- http://bjallstar.com/upload/file/44116616757.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5efae14136---18165787536.pdfIn PDF document text
- http://daotaonhaccong.com/uploads/userfiles/file/lorogiriwunebuk.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071e07fb0715---9777655676.pdfIn PDF document text
- http://bephoangdung.vn/uploads/ckfinder/files/sexizitalisomit.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6605e8c4116351d71971585f3df470b9/74187193450.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52cd276fc---59172796432.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072d97818929---18444758629.pdfIn PDF document text
- http://resortvillairene.it/userfiles/files/4526446808.pdfIn PDF document text
- https://aonetreks.com/uploads/file/fupozuroneralilanivo.pdfIn PDF document text
- https://varbackaforskola.se/ckfinder/userfiles/files/voleti.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/2807b7db304cb35bd71b4637c98b7540/53252283449.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/527fa740b0a1a158622a2c2584123a67/xidomabegovusilepujo.pdfIn PDF document text
- https://wipaphun.com/UserFiles/File/35246140462.pdfIn PDF document text
- http://princeworldwide.com/multimedia/userfiles/file/pitumadarejono.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1f21e94d2b0a85eb250802c47135c6ff/2012590239.pdfIn PDF document text
- https://hiddencliff.kr/FileData/ckfinder/files/20210630_C186483632837519.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f59ee4f1b0ca98d47f2758583c64a997/79773684797.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_off0000d856.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD856	17544 bytes
SHA-256: `c86b0980ec4e5eb16560228d17884e5bcdd9e0fef1e89c3e8f174387cba64041`
`font_01_sfnt_off00010628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10628	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E3F	11068 bytes
SHA-256: `7137490181f17376b8b107d051741bfe817040b45ae32a37f259ebe859218819`

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