PDF malware analysis — malicious · 4111d2a5d74e3e86

MALICIOUS

PDF

74.7 KB Created: 2021-05-30 05:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: dc581c7b32a1c6ce5430a9f2aa8550c6 SHA-1: 2010fae002b9c491d56bdbccdf772fa571ed657a SHA-256: 4111d2a5d74e3e86389c72cc959357ee3994246d27b1e2e0253f6fa3a56b1f02

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://soxebez.ru/strik?utm_term=hello+brother+telugu+movie+nagarjuna', is likely part of the malicious redirection chain. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://soxebez.ru/strik?utm_term=hello+brother+telugu+movie+nagarjuna PDF link annotation
- https://static.s123-cdn-static.com/uploads/4383913/normal_6007d89ca25ec.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4393208/normal_60b18dc73adfe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421040/normal_6064617605867.pdfIn PDF document text
- https://saxukenewu.weebly.com/uploads/1/3/4/6/134649668/fetixulosizeki.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500893/normal_6015f0b9a912e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494149/normal_60235256d619c.pdfIn PDF document text
- https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/vaxikexuxukilazu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369651/normal_5fe96564346e7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378382/normal_602fee602bd74.pdfIn PDF document text
- https://giwonogudere.weebly.com/uploads/1/3/4/8/134872327/nitelusanapisimu.pdfIn PDF document text
- https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/tewuroxuv.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408865/normal_5ff2163f8aeb5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366321/normal_60537b2b3b058.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491927/normal_6025bc5289fd2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451363/normal_605d87e532ce3.pdfIn PDF document text
- https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/suzowuwep.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495551/normal_5ff8bef9259be.pdfIn PDF document text
- https://febujularezot.weebly.com/uploads/1/3/0/8/130813651/sifun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473638/normal_60297d2989625.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488556/normal_5fe3c7153d12d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/6c9b6adc-96dd-4e10-82c9-bd59dc6cfee9/marie_forleo_make_every_man_want_you_audiobook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/22c69aff-0abd-442c-80b6-3303c72cf621/17595791161.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49d7b0ab-fb34-4f64-9a7b-9bf5d9a57085/40580913929.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7F1	5040 bytes
SHA-256: `1785923d55a6691fcf7b86d836692d582bb6b33d78ef5f1c0db9222e38dc933f`
`font_01_sfnt_off0000e8f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8F6	10708 bytes
SHA-256: `c344bab4527eb01d67c9fc2ec11cb3d998132f712c500fbaff2b64d959770306`
`font_02_sfnt_off00010d7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D7F	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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