PDF malware analysis — malicious · e5239a7285f5d31a

MALICIOUS

PDF

124.1 KB Created: 2021-05-21 13:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: e5657004755932b33023f3bc7e438027 SHA-1: afefeacd7484cf58cd0827faad3ca1801dd90f73 SHA-256: e5239a7285f5d31a40da2bb596cc489e5f106e9e77baaf36eb2b2a654c7161b0

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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://seumenha.ru/strik?utm_term=modern+combat+5+cheat+codes PDF link annotation
- https://static.s123-cdn-static.com/uploads/4420745/normal_5fefc8a6652f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366995/normal_6019f98fc612e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4503050/normal_5fd1008de39ad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469849/normal_60660244749f5.pdfIn PDF document text
- https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/1398172.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481820/normal_6006d3c4625fb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498645/normal_5ffd2cc3afe26.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500444/normal_5ffea3ade8911.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426676/normal_6025fa844ed13.pdfIn PDF document text
- https://ropedali.weebly.com/uploads/1/3/0/9/130969406/bawumidumudus.pdfIn PDF document text
- https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/gigijetafexofu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426820/normal_5ff87d61b569c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376362/normal_6050bbb09c86c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495393/normal_604ded395d23c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420903/normal_5fddbf90142ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426407/normal_60552f47a40f3.pdfIn PDF document text
- https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/52210676.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446924/normal_5fe565af3773e.pdfIn PDF document text
- https://luxederobidurip.weebly.com/uploads/1/3/4/6/134603039/4666139.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417212/normal_60513a7eeb7e5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445742/normal_6002647222a68.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/a852866e-0833-4d65-981b-4753b0c60594/percy_jackson_and_the_last_olympian_chapter_14.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e1b49e4c-851e-4059-b10a-186217ebfb14/46750875334.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/15456339-6fa0-420b-8c5c-def651c19c0d/38227949968.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f56203b-48b3-444b-b7b3-e58c6bdfa726/colleges_that_offer_mechanical_engineering_in_florida.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
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0001bdaf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1BDAF	20708 bytes
SHA-256: `81c8081ef8be943544da1c15ed495190ab413bbee61026820ea1bb5f02597e46`
`font_00_sfnt_off00016ded.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16DED	5416 bytes
SHA-256: `bf409aa3d6a5f828aa1e9cb69c6d076544a9a47cc42827bceed28fba876f3d4d`
`font_01_sfnt_off00018030.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18030	3392 bytes
SHA-256: `537b8dbb5dc789366025c7f2a139014e76469fd7652056aac7a2aa0c7420af97`
`font_02_sfnt_off00018dd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18DD3	14684 bytes
SHA-256: `fe14d5166f275e5a43940fb2211a4e53419e5e2b4c5cbe172357071deebf0c2b`

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