PDF malware analysis — malicious · 626f9ddd7960fa65

MALICIOUS

PDF

87.5 KB Created: 2021-07-01 00:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 427c21b2c77d9aecf73deb04e3ff0b47 SHA-1: c237d2ea277136571f3a205c198b0a9f6362ff81 SHA-256: 626f9ddd7960fa6596a2d8e42febb5c02588325b0db2251a434ab2a7989cdc86

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised or disposable domains. The primary purpose appears to be redirecting users to malicious content, likely to facilitate further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://greenbrier101.com/userimages/ravuzepati.pdf In PDF document text
- http://ural-resyrs.ru/data/file/26902006498.pdfIn PDF document text
- https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/56b7a44492318e5dbd1be3150f598876/bejovaroti.pdfIn PDF document text
- http://partnerplus30.ru/images/fornews/files/dinelituniporajanapodeli.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/3189479784.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/369efb867893f74e4b695c68bc913fd9/puvatifopifususogosowe.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b33a30919b---disizuvapavali.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa3e996ac4---35988914961.pdfIn PDF document text
- https://sindonis.com/userfiles/file/69368311119.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/615472f9447b2cdad93724efd91cdab3/leravotubomakedetapexepov.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737720078ae---98541915424.pdfIn PDF document text
- http://tuning-zone.eu/userfiles/file/xutagedelutaxebalixofaz.pdfIn PDF document text
- http://staractivecollection.com/resimler/site/files/pujakusufufijuzubok.pdfIn PDF document text
- http://hagelkonzept.de/userfiles/file/turinezumomuna.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/70hbauqaekuulsihd1vvtprq3u/zozawigigujisukaxosegik.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe46ec8150---43697632012.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac9ee6b2a7---sewonijal.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vn4ag70lgm3h81cbcb451gfjl0/lesemozulokizafaxesi.pdfIn PDF document text
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/08c33b25e8035d7c0e43a1633bbaaf98/9536321859.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/07/files/210701035029.pdfIn PDF document text
- http://originalcheck.it/public/img_admin/file///mowikaduzetof.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5efc88a0351fc5e75f56b31b56c3efa1/rofawetepe.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160803bcfa5dad---91118060032.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85554aa406---lowetosozivanisulawuzuf.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e45f4f42c---girolun.pdfIn PDF document text
- http://cgpreceptor.com/ckfinder/userfiles/files/87824508768.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=example+of+first+type+of+leverPDF 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_off0000f28c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF28C	17312 bytes
SHA-256: `753271e38d65632ad2e6d290735206d7a58d4bce73a8613896c252a3cedc46cb`
`font_01_sfnt_off00011fe6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FE6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000137fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137FD	10680 bytes
SHA-256: `3be55a35ccad31960aad829d3f9883042af95f516ef38e35b510635b8a8f1368`

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