PDF malware analysis — malicious · 08a65c6fae3a5689

MALICIOUS

PDF

75.2 KB Created: 2021-07-15 23:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: f35c25ccc6fa208ad290b839a85756be SHA-1: be10e205f8b6f672889b3f220574c392202fad14 SHA-256: 08a65c6fae3a5689e77db2f2cbcb4195449c697f1641c7d26e8c42a386d5cff7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains a link farm pointing to numerous distinct hosts, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://mimpishiosatu.com/contents//files/satolisotedumiwuzo.pdf In PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c07755495---refujuvikopobituno.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d38438f67b2b2dd0bdafae9ea969b210/potukezo.pdfIn PDF document text
- https://foodphotoshop.com/userfiles/files/23201359950.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160791bd3dc45a---bunedo.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f59f7ef78---2959136154.pdfIn PDF document text
- http://t-p-fortune.com/userfiles/file/zawifoli.pdfIn PDF document text
- http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/jinepavigeranaf.pdfIn PDF document text
- http://gdgom.com/upload/file/210625071841952387cicgp4ekl935.pdfIn PDF document text
- https://rdsdealers.com/ckfinder/userfiles/files/61925492628.pdfIn PDF document text
- http://olsztyntransportmedyczny.pl/userfiles/file/medagiwuduj.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607a25bddd816---mezenemurosekal.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ef2db2586b176598f0e2c53b546b1094/mudelipirir.pdfIn PDF document text
- http://trendybiz.in/usersfiles/file/60177712536.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/4ite2f2605q59b9hd7p0n816h1/juvak.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ba846ad38---38405031429.pdfIn PDF document text
- http://meteosputnik.ru/userfiles/file/42403639002.pdfIn PDF document text
- https://next-engineering.com/userfiles/files/jelabenibasome.pdfIn PDF document text
- https://windsbs.biz/files/file/83286641989.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/fisar.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbc5dc0a6d---losizada.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c549e6b2c2a---76852953841.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cfecb4dec0d---41200287511.pdfIn PDF document text
- http://backkwang.com/userData/board/file/44144383950.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/wopolujuwodox.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dd1368385---90265504111.pdfIn PDF document text
- https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/182f541d76101e9632ea7099addcb0d7/gabelilutugajukofosozusev.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/167dd57292a6f178709551e43d385979/7201219705.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=today%27s+homily+by+bishop+barronPDF link annotation
- 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_off0000c5a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5A3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ddb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDB5	16120 bytes
SHA-256: `50778debc1aab103dba05a1cee203c642d4f3c4da2c61f59e1bf7ce3ebe743f2`
`font_02_sfnt_off0001073f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1073F	10676 bytes
SHA-256: `cd5e9ad415b50fbeb7d9028087fe166b49445b593b445392d61e057514aa8757`

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