PDF malware analysis — malicious · 5a6a784d89c2e43d

MALICIOUS

PDF

70.3 KB Created: 2021-09-28 23:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 736f3c43a530277eccb980a0aab55aba SHA-1: 28e3f4ec768552fd23b84da708c022a241709144 SHA-256: 5a6a784d89c2e43de68500a5b4d0db5964ba3c3aa12766051bbf652d8a3db10e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to domains that appear to be disposable or compromised, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards an attack pattern involving redirection to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=nil+battey+sannata+full+movie PDF link annotation
- https://holycrosshealthcare.com/userfiles/files/27083389708.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/20219510113048.pdfIn PDF document text
- https://altsovmun.ru/userfiles/file/47094411430.pdfIn PDF document text
- http://smirna.pl/files/file/rojes.pdfIn PDF document text
- https://maxlinder.com/admin/assets/ckfinder/userfiles/files/voxataderub.pdfIn PDF document text
- http://noithatachau.vn/webroot/img/files/26704459261.pdfIn PDF document text
- http://canadanur.com/resimler/files/gijifemuvametunirigagowo.pdfIn PDF document text
- http://poddertradingandindustries.com/userfiles/file/7357296069.pdfIn PDF document text
- https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/jobinivasuferefezefim.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-9-27/20210927062329387720.pdfIn PDF document text
- http://logiccpacma.com/ckfinder/userfiles/files/rigidose.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/82727341494.pdfIn PDF document text
- http://yingtailong.com/upload/file/210922003144420423uz3ybhfuhbx7.pdfIn PDF document text
- https://lifesmart.ro/ckfinder/userfiles/files/7537803612.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d13bb83e805868b5b2a59952e86505d7/jekozisopifabujujen.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/addaa137e6df22f1713c030e39264fa2/45205478672.pdfIn PDF document text
- http://daiduongmetal.com/uploads/ckfinder/files/54500009798.pdfIn PDF document text
- https://tranhtreo.com/images/ckeditor/files/4495881384.pdfIn PDF document text
- http://dulichtantai.com/files/uploaded/files/45600169266.pdfIn PDF document text
- http://mispuntossaga.com/campannas/file/53378089236.pdfIn PDF document text
- https://yasacompany.com/upload/files/raxowabuxuwasapiwiv.pdfIn PDF document text
- https://hotnews.md/upload/userfiles/files/temevutamim.pdfIn PDF document text
- http://sumosushingrill.com/uploads/files/11755700644.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/b114d53c06f2f49f07fef6176cb6debf/keniwetebazidap.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_off0000b0cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0CB	16580 bytes
SHA-256: `3dd661b73c5020abd7cc74f4183c301a91c231fe0e4ce2d702fe24344d72bac8`
`font_01_sfnt_off0000dadc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDADC	10672 bytes
SHA-256: `f61dd87b43c5183fd66618862344a36df1bd7b828eec9ff7e0c1f03f032493bc`
`font_02_sfnt_off0000f367.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF367	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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