PDF malware analysis — malicious · 60aa40a15a3557da

MALICIOUS

PDF

83.7 KB Created: 2021-09-27 22:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 260cc7bb1ac30a9c472e8e12058d4159 SHA-1: a0bd2d2b0b864fd81661bfe595000f284938bdc9 SHA-256: 60aa40a15a3557da6bcc2ffd6eba9824d7e5d48d8ab8412777df6f7f6ba7c784

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. Heuristics indicate it contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs likely lead to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9923

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://medvor.ru/uplcv?utm_term=glitch+video+effect+pro PDF link annotation
- http://icloudcleaners.com/uploads/account/autoresponderfiles/fonaxerakabite.pdfIn PDF document text
- http://net-work.cz/data/file/xopadisidakijig.pdfIn PDF document text
- https://hgindustrial.eu/userfiles/files/lipakonixurupiwawavovek.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/q54slmune4m8k7abb5052btn2n/puburigasudowog.pdfIn PDF document text
- https://shatalarab-llc.net/userfiles/files/budulov.pdfIn PDF document text
- http://hengtongrongshang.com/jingkelun/userfiles/files/20210914051707.pdfIn PDF document text
- http://phone-server.com/userfiles/file/32807204088.pdfIn PDF document text
- http://reafamily.lt/ckfinder/userfiles/files/fawubotosanusiniritur.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140b839aca93---malinaxusanajurolerowen.pdfIn PDF document text
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/36588533746.pdfIn PDF document text
- https://groupunsur4.com/contents/files/56981009050.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f807e3cfc5---16385435331.pdfIn PDF document text
- http://freetourscadiz.com/ckfinder/userfiles/files/gorekilijapadininokozal.pdfIn PDF document text
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/c0bg6p4efnefa79sbbhr7b02sh/kuteponolagupobukekisob.pdfIn PDF document text
- http://yuc-fac.com/uploadfiles/20210909082707.pdfIn PDF document text
- http://i-harmonics.com/upload/files/musupukexuzuj.pdfIn PDF document text
- http://julianina.dk/upload/file/zojafe.pdfIn PDF document text
- http://qbcar.ru/ckfinder/userfiles/files/36784093172.pdfIn PDF document text
- http://addisonplaza.abwingsmd.com/uploads/files/34357022867.pdfIn PDF document text
- http://buyyoutubecomments.com/ci/userfiles/files/miroxovugofufedikup.pdfIn PDF document text
- https://guanlai.tw/uploads/files/202109180436052374.pdfIn PDF document text
- https://morganmethod.com/ci/userfiles/files/pabololemiviba.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdeace22b4---dojobexuzedebupis.pdfIn PDF document text
- https://aurorahoian.com/app/webroot/upload/files/24336237368.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c846.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC846	19428 bytes
SHA-256: `a643f272e760643c6e30a80877b529de148c1d5b84c43a411abdfc15f8369082`
`font_01_sfnt_off0000faaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAAA	10388 bytes
SHA-256: `067d4bdfcde03cc69c53726fef15932bed2a71a805faf27b7cc6fefa2875e528`
`font_02_sfnt_off00011244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11244	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00012a55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A55	16448 bytes
SHA-256: `0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878`

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