PDF malware analysis — malicious · a543129073a6ac80

MALICIOUS

PDF

78.3 KB Created: 2021-08-19 11:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 16ad9d1ea74c72226ecf0dfcebfb3075 SHA-1: 302802c957c240d3c0c5c616b678c2c3e6bea219 SHA-256: a543129073a6ac808a4648af10b50a0e666b7a2173c9aeec633d858e85ef36b4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The heuristic firings indicate this is a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the URLs and the ML classifier's high confidence suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://oniceh.ru/uplcv?utm_term=new+cutting+edge+intermediate+workbook+audio PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc54db1f87---nipufiwatututi.pdfIn PDF document text
- http://erodiertechnik-wenzel.de/userfiles/file/tataxonibur.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda019947cf---59750284446.pdfIn PDF document text
- https://cubic.is/userfiles/file/samufobawukalubozum.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/064a5c5a9a67f81dd274f0fe8936798e/85712038089.pdfIn PDF document text
- https://edcasys.com/ci/userfiles/files/xalurisikuvazigowutonuxiz.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0927ad72---tisekedimukazatojinumis.pdfIn PDF document text
- http://tuccifamilyonline.com/clients/b/b5/b5aed9f4ae8fd2b300021b46b426cae6/File/53913332164.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-26/20210526072044657753.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b296bbfba---26820711401.pdfIn PDF document text
- https://kodcomputers.ro/2664/uploads/16466674313.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/143a27482e9c0f678d2c9b6c87812fe6/nerezol.pdfIn PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/u55lgvvvoleq51rndltip0a067/41938182570.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/eda6e527c2fc4bf591e669c2f84b455d/52889962662.pdfIn PDF document text
- https://tortugafilms.ca/adminfiles/file/tuwebidowomumube.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbc4115e0---rutevurogelimoketita.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883699ebfd4---numuxafusatulivotixuvad.pdfIn PDF document text
- http://wanyuantemple.tw/userfiles/file/7160461930.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85342c5c6---kitisetirimilodov.pdfIn PDF document text
- http://zge-led.com/luodan/images/userfiles/file/36176305131.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/cc455538bae3b4ba7a248e1285d10e2b/jijagawojin.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/df11410ef87ac14fd9e0b9bfd12a8306/4937739791.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gemq55rdjmp04e1kc27cks48gj/zefovaruwajomenop.pdfIn PDF document text
- https://jagamimpi.info/contents//files/91108314393.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_off0000c9ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9AB	19124 bytes
SHA-256: `e8770e66f55479279ca3148cbd3653417619769cae14a8c1efeb54968831b171`
`font_01_sfnt_off0000f98b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF98B	10896 bytes
SHA-256: `87816b5d653067d79dbd0503ba4894117db88349782ebad1cf489e60db13a77f`
`font_02_sfnt_off0001129b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1129B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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