PDF malware analysis — malicious · 86438b30c17d4a05

MALICIOUS

PDF

75.8 KB Created: 2021-09-28 11:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 69b22b8d97ca0f593af758c82f3ca3d5 SHA-1: 5fb4c48c08ba974b436b4334cdf3d870abf828c6 SHA-256: 86438b30c17d4a05fd4dc7f2e2a26bdca2b9c20101bc553b7accd16df7d9dd61

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, which is a common technique for executing malicious actions. The JavaScript likely redirects users to external URLs hosted on compromised websites, as indicated by the 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. These URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

Heuristics 7

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://ketchas.ru/uplcv?utm_term=2016+ap+chemistry+multiple+choice PDF link annotation
- http://futureinfashion.com/ckfinder/userfiles/files/nawukeveruleramepazefix.pdfIn PDF document text
- http://alacarte-grafik.de/userfiles/file/13795006610.pdfIn PDF document text
- https://parisnordmedical.fr/docs/file/49615025022.pdfIn PDF document text
- https://kamwalibais.com/userfiles/file/60553010247.pdfIn PDF document text
- http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/30245585765.pdfIn PDF document text
- https://manhremhoangvan.vn/wp-content/uploads/files/vosusupatidof.pdfIn PDF document text
- http://wizclub.net/upload/userfiles/file/pamewekisewab.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/810ce14f316d98e6f683bc4310f5da28/tekosutufe.pdfIn PDF document text
- https://www.privathospitaletkollund.com/ckfinder/userfiles/files/toriz.pdfIn PDF document text
- https://paroles-vives.com/ckfinder/userfiles/files/84017373562.pdfIn PDF document text
- http://jawarakreasi.com/file/74134977090.pdfIn PDF document text
- https://gkscam.com/userfiles/file/54524337290.pdfIn PDF document text
- http://kcpsystem.com/userData/board/file/51878512411.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ea351ee043---lawep.pdfIn PDF document text
- http://verzorgingsindex.nl/images/uploads/3063430597.pdfIn PDF document text
- http://ave-france.com/pics/files/parabaditowokozuborijenu.pdfIn PDF document text
- http://www.schule.havonix.com/ckfinder/userfiles/files/23610159396.pdfIn PDF document text
- https://angel-juicer.com/FileData/ckfinder/files/20210919_4140B5F4FF91DCFF.pdfIn PDF document text
- https://tempatpasang.com/contents/files/7768149182.pdfIn PDF document text
- http://maydemtienvn.com/upload/files/somaf.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/djcd161c0icd3vcofkt4qgc85s/85289245005.pdfIn PDF document text
- http://lovesenergy.com/file/35386913570.pdfIn PDF document text
- http://e-motyle.natura2000.pl/imgturysta/files/78100532220.pdfIn PDF document text
- http://seksdagen.nl/userfiles/file/nifuvigorebu.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_off0000b01e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB01E	16232 bytes
SHA-256: `01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684`
`font_01_sfnt_off0000c5f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000de0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE0E	11116 bytes
SHA-256: `f64793ed96af2b1d859a21f21613244412685fb6d14edcf537d752b60669c1b9`
`font_03_sfnt_off0000f81a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF81A	16160 bytes
SHA-256: `1bf4acee201c453365928e96d1d7fd20e18396d0f77d3a76f0a0b498e1f523de`

Open this report in the interactive analyzer, or submit your own file for analysis.