PDF malware analysis — malicious · f7e5fe6d049b7018

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 18:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 281ba868dc9ee6657b38a8ea2cbfd715 SHA-1: 46fef87c94fe95d4a364f54980263758a331825e SHA-256: f7e5fe6d049b70186398d114c4b4b6567757b28e7c650233df2f7567c1a6c20b

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDFs hosted on disposable domains. The presence of a 'download' button lure and the ML classifier's high confidence score indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://synerhu.ru/pbw?utm_term=loser+team+201+raw PDF link annotation
- https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/558383.pdfIn PDF document text
- https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/zufitisepopogupamiku.pdfIn PDF document text
- https://kenigoxiwe.weebly.com/uploads/1/3/0/9/130970014/zotuketulakizedukov.pdfIn PDF document text
- https://wipevotabekux.weebly.com/uploads/1/3/1/6/131607119/wadevagep.pdfIn PDF document text
- https://farezixinebi.weebly.com/uploads/1/3/4/2/134266061/tilajurisebip.pdfIn PDF document text
- https://womurozini.weebly.com/uploads/1/3/4/5/134507066/2747589.pdfIn PDF document text
- https://setozovijigaze.weebly.com/uploads/1/3/4/3/134383391/wajovufije.pdfIn PDF document text
- https://bisubobotikimix.weebly.com/uploads/1/3/1/4/131438323/ratez_rumuletedun.pdfIn PDF document text
- https://bojuzogonugux.weebly.com/uploads/1/3/5/3/135304036/nofomilixumomev_zadijin_genibimis_ralefamene.pdfIn PDF document text
- https://telexetobowu.weebly.com/uploads/1/3/4/3/134339901/2970361.pdfIn PDF document text
- https://ledoxobi.weebly.com/uploads/1/3/4/7/134703017/efa05970.pdfIn PDF document text
- https://sesuzefodapu.weebly.com/uploads/1/3/2/8/132815176/tamoba-jurinevif-lofatijaga.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/2323f53d-202c-4afd-80a9-87ac6272e1d4/lakebuxema.pdfIn PDF document text
- http://jujirafamena.pbworks.com/w/file/fetch/144448998/molekofakogak.pdfIn PDF document text
- http://wirabofitox.pbworks.com/w/file/fetch/144744213/5266492220.pdfIn PDF document text
- http://paderukut.pbworks.com/w/file/fetch/144609153/broiler_breeder_egg_production.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2efaf040-7ad5-40db-aece-94516e1411bf/81463774897.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a8c0cb6e-9058-431d-b2ce-9dd09aed5fa5/benesaruginuwus.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f36f01d5-63c9-44c0-a1a7-16a58203c158/how_to_add_comment_in_reader.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b87677e3-1346-4d68-9ff5-b6b75cfd4d77/solving_trigonometric_functions_calculator.pdfIn PDF document text
- http://wijozuzapusa.pbworks.com/w/file/fetch/144474909/82652387656.pdfIn PDF document text
- http://gogoporiwo.pbworks.com/f/xomojewaxibul.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_off0000e80f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE80F	3036 bytes
SHA-256: `37a29e1d0569001934981d3ceb70d5ad7cccf6d274edcfb1b3c7e5f038df07e2`
`font_01_sfnt_off0000f2fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2FC	5160 bytes
SHA-256: `5f22311bc3fcf08865943da8ed3b7df933919386e2c8d71bc7335205388e568a`
`font_02_sfnt_off00010485.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10485	11176 bytes
SHA-256: `69511ca80b9176d8eaf5c144d67d2e483e26e38fe9cc87d5b56b2e718db0ddb9`

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