PDF malware analysis — malicious · d06e2306c041d6a4

MALICIOUS

PDF

67.5 KB Created: 2021-09-26 21:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: e85d750f0e55f04e866ce45327e93228 SHA-1: e77132e1b777bd620882d006608a8214343b7f17 SHA-256: d06e2306c041d6a402ff82286f5a137d94afe99c17c291f9cab0cfe8792f2d8d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious sites. The primary URL, 'https://drafthe.ru/uplcv?utm_term=harry+potter+full+movie+streaming', appears to be a redirector for further malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://drafthe.ru/uplcv?utm_term=harry+potter+full+movie+streaming PDF link annotation
- http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339a6934faf---gexudujurizi.pdfIn PDF document text
- http://taxilitomerice.cz/ckfinder/userfiles/files/48478215480.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/0f5b817c3a30735289febdabe9448a75/75898747566.pdfIn PDF document text
- http://patrick-vallot.com/upload/files/mulinaredivatanejova.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6bfec1ca3---97482251607.pdfIn PDF document text
- http://istanbulballoons.com/ckfinder/userfiles/files/xupobipojetuzuv.pdfIn PDF document text
- https://rosedreamholidayhomes.com/ckfinder/userfiles/files/nufawamabixerusalizovito.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0a7ebeffce3cb853e2c35df338a55eea/21536132164.pdfIn PDF document text
- http://imaginove.eu/data/Files/zobamurujonoduronop.pdfIn PDF document text
- http://nbkhjc.com/uploads/202109/file/210904044322150130fpo783fz9xwk.pdfIn PDF document text
- http://mobiliteit.nu/files/xasadowov.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145db2409370---durapidukos.pdfIn PDF document text
- http://ltpbetel.ro/userfiles/file/tilifenawupapudagulur.pdfIn PDF document text
- http://jingmingtai.com/filespath/files/20210926055409.pdfIn PDF document text
- http://autoscuolapezzano.it/userfiles/files/76826757383.pdfIn PDF document text
- http://z500.si/files/39417329418.pdfIn PDF document text
- http://airfa.it/userfiles/file/gukozipa.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_off0000a7b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA7B7	15152 bytes
SHA-256: `cd05a4357394f57c694e1decc6bc5071145bf6c64122ad07b18eb9c792af6c6b`
`font_01_sfnt_off0000cddd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDDD	10972 bytes
SHA-256: `d01cd62a061622b00af5fff9d1c665f09586ba35a1a5bad6a9b57fa23102835b`
`font_02_sfnt_off0000e759.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE759	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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